diff --git a/packages/compat/src/compat-adapters/@glimmer/tracking.ts b/packages/compat/src/compat-adapters/@glimmer/tracking.ts
new file mode 100644
index 000000000..5286aece6
--- /dev/null
+++ b/packages/compat/src/compat-adapters/@glimmer/tracking.ts
@@ -0,0 +1,34 @@
+import V1Addon from '../../v1-addon';
+import Plugin from 'broccoli-plugin';
+import { join } from 'path';
+import { outputFileSync, copyFileSync } from 'fs-extra';
+
+/*
+  @glimmer/tracking is a real package but it has no working implementation. The
+  real implementation is in ember-source.
+
+  Since embroider prioritizes real packages, it's best to provide a compat
+  adapter here to make it into a valid package. It's easy enough for it to
+  reexport the things from ember that are needed.
+*/
+class RedirectToEmber extends Plugin {
+  private didBuild = false;
+
+  build() {
+    if (!this.didBuild) {
+      copyFileSync(join(this.inputPaths[0], 'package.json'), join(this.outputPath, 'package.json'));
+      outputFileSync(join(this.outputPath, 'index.js'), `export { tracked } from '@ember/-internals/metal';`);
+      outputFileSync(
+        join(this.outputPath, 'primitives', 'cache.js'),
+        `export { createCache, getValue, isConst } from "@ember/-internals/metal";`
+      );
+      this.didBuild = true;
+    }
+  }
+}
+
+export default class extends V1Addon {
+  get v2Tree() {
+    return new RedirectToEmber([super.v2Tree]);
+  }
+}
diff --git a/packages/compat/src/compat-adapters/ember-cli-fastboot.ts b/packages/compat/src/compat-adapters/ember-cli-fastboot.ts
index 6370dfbbf..2a1fe1f04 100644
--- a/packages/compat/src/compat-adapters/ember-cli-fastboot.ts
+++ b/packages/compat/src/compat-adapters/ember-cli-fastboot.ts
@@ -6,6 +6,7 @@ import { join } from 'path';
 import writeFile from 'broccoli-file-creator';
 import { Memoize } from 'typescript-memoize';
 import bind from 'bind-decorator';
+import { AddonMeta } from '@embroider/shared-internals';
 
 export default class EmberCliFastboot extends V1Addon {
   customizes(...trees: string[]): boolean {
@@ -141,6 +142,17 @@ class RewriteManifest extends Plugin {
       extraVendorFiles,
     };
 
+    // because we contain a subdir with its own package.json, that subdir
+    // becomes a "package" from emroider's perspective, and if we want it to get
+    // treated as ember code it needs to have v2 addon metadata
+    json.keywords = [...(json.keywords ?? []), 'ember-addon'];
+    let meta: AddonMeta = {
+      type: 'addon',
+      version: 2,
+      'auto-upgraded': true,
+    };
+    json['ember-addon'] = meta;
+
     outputJSONSync(join(this.outputPath, '_fastboot_', 'package.json'), json, { spaces: 2 });
   }
 }
diff --git a/packages/compat/src/compat-adapters/ember-source.ts b/packages/compat/src/compat-adapters/ember-source.ts
index 98b1802fd..7d3af017d 100644
--- a/packages/compat/src/compat-adapters/ember-source.ts
+++ b/packages/compat/src/compat-adapters/ember-source.ts
@@ -1,80 +1,9 @@
 import V1Addon from '../v1-addon';
 import buildFunnel from 'broccoli-funnel';
 import mergeTrees from 'broccoli-merge-trees';
-import AddToTree from '../add-to-tree';
-import { outputFileSync, unlinkSync } from 'fs-extra';
-import { join } from 'path';
-import semver from 'semver';
 
 export default class extends V1Addon {
-  private useRealModules = semver.satisfies(this.packageJSON.version, '>=3.27.0-beta.0', { includePrerelease: true });
-
   get v2Tree() {
     return mergeTrees([super.v2Tree, buildFunnel(this.rootTree, { include: ['dist/ember-template-compiler.js'] })]);
   }
-
-  // when using real modules, we're replacing treeForAddon and treeForVendor
-  customizes(treeName: string) {
-    return (
-      (this.useRealModules && (treeName === 'treeForAddon' || treeName === 'treeForVendor')) ||
-      super.customizes(treeName)
-    );
-  }
-
-  invokeOriginalTreeFor(name: string, opts: { neuterPreprocessors: boolean } = { neuterPreprocessors: false }) {
-    if (this.useRealModules) {
-      if (name === 'addon') {
-        return this.customAddonTree();
-      }
-      if (name === 'vendor') {
-        return this.customVendorTree();
-      }
-    }
-    return super.invokeOriginalTreeFor(name, opts);
-  }
-
-  // Our addon tree is all of the "packages" we share. @embroider/compat already
-  // supports that pattern of emitting modules into other package's namespaces.
-  private customAddonTree() {
-    return mergeTrees([
-      buildFunnel(this.rootTree, {
-        srcDir: 'dist/packages',
-      }),
-      buildFunnel(this.rootTree, {
-        srcDir: 'dist/dependencies',
-      }),
-    ]);
-  }
-
-  // We're zeroing out these files in vendor rather than deleting them, because
-  // we can't easily intercept the `app.import` that presumably exists for them,
-  // so rather than error they will just be empty.
-  //
-  // The reason we're zeroing these out is that we're going to consume all our
-  // modules directly out of treeForAddon instead, as real modules that webpack
-  // can see.
-  private customVendorTree() {
-    return new AddToTree(this.addonInstance._treeFor('vendor'), outputPath => {
-      unlinkSync(join(outputPath, 'ember', 'ember.js'));
-      outputFileSync(join(outputPath, 'ember', 'ember.js'), '');
-      unlinkSync(join(outputPath, 'ember', 'ember-testing.js'));
-      outputFileSync(join(outputPath, 'ember', 'ember-testing.js'), '');
-    });
-  }
-
-  get packageMeta() {
-    let meta = super.packageMeta;
-    if (this.useRealModules) {
-      if (!meta['implicit-modules']) {
-        meta['implicit-modules'] = [];
-      }
-      meta['implicit-modules'].push('./ember/index.js');
-
-      if (!meta['implicit-test-modules']) {
-        meta['implicit-test-modules'] = [];
-      }
-      meta['implicit-test-modules'].push('./ember-testing/index.js');
-    }
-    return meta;
-  }
 }
diff --git a/packages/core/src/app.ts b/packages/core/src/app.ts
index 9af58d52e..34b56179f 100644
--- a/packages/core/src/app.ts
+++ b/packages/core/src/app.ts
@@ -910,11 +910,14 @@ export class AppBuilder<TreeNames> {
   }
 
   private combinePackageJSON(meta: AppMeta): object {
-    let pkgLayers = [this.app.packageJSON, { keywords: ['ember-addon'], 'ember-addon': meta }];
+    let pkgLayers: any[] = [this.app.packageJSON];
     let fastbootConfig = this.fastbootConfig;
     if (fastbootConfig) {
+      // fastboot-specific package.json output is allowed to add to our original package.json
       pkgLayers.push(fastbootConfig.packageJSON);
     }
+    // but our own new v2 app metadata takes precedence over both
+    pkgLayers.push({ keywords: ['ember-addon'], 'ember-addon': meta });
     return combinePackageJSON(...pkgLayers);
   }
 
@@ -1107,12 +1110,6 @@ export class AppBuilder<TreeNames> {
     }
 
     let eagerModules = [];
-    if (!this.adapter.adjustImportsOptions().emberNeedsModulesPolyfill) {
-      // when we're running with fake ember modules, vendor.js takes care of
-      // this bootstrapping. But when we're running with real ember modules,
-      // it's up to our entrypoint.
-      eagerModules.push('@ember/-internals/bootstrap');
-    }
 
     let requiredAppFiles = [this.requiredOtherFiles(appFiles)];
     if (!this.options.staticComponents) {
@@ -1257,13 +1254,6 @@ export class AppBuilder<TreeNames> {
       explicitRelative(dirname(myName), this.topAppJSAsset(engines, prepared).relativePath),
     ];
 
-    if (!this.adapter.adjustImportsOptions().emberNeedsModulesPolyfill) {
-      // when we're running with fake ember modules, the prebuilt test-support
-      // script takes care of this bootstrapping. But when we're running with
-      // real ember modules, it's up to our entrypoint.
-      eagerModules.push('ember-testing');
-    }
-
     let amdModules: { runtime: string; buildtime: string }[] = [];
     // this is a backward-compatibility feature: addons can force inclusion of
     // test support modules.
diff --git a/packages/router/config/ember-try.js b/packages/router/config/ember-try.js
index 96f65c13b..9b5d6a339 100644
--- a/packages/router/config/ember-try.js
+++ b/packages/router/config/ember-try.js
@@ -39,22 +39,6 @@ module.exports = function () {
             },
           },
         },
-        {
-          name: 'ember-beta',
-          npm: {
-            devDependencies: {
-              'ember-source': urls[1],
-            },
-          },
-        },
-        {
-          name: 'ember-canary',
-          npm: {
-            devDependencies: {
-              'ember-source': urls[2],
-            },
-          },
-        },
       ],
     };
   });
diff --git a/packages/shared-internals/src/ember-standard-modules.ts b/packages/shared-internals/src/ember-standard-modules.ts
index e8222aed0..ab3d6fa7d 100644
--- a/packages/shared-internals/src/ember-standard-modules.ts
+++ b/packages/shared-internals/src/ember-standard-modules.ts
@@ -24,7 +24,7 @@ export const emberVirtualPackages = new Set<string>(mappings.map((m: any) => m.m
 // makes the migration from v1 to v2 addons more painful than necessary, because
 // a v1 addon in between the app and a v2 addon might not declare the peerDep,
 // breaking the deeper v2 addon.
-export const emberVirtualPeerDeps = new Set<string>(['@glimmer/component']);
+export const emberVirtualPeerDeps = new Set<string>(['@glimmer/component', '@glimmer/tracking']);
 
 // this is a real package, even though it's still listed in rfc176
 emberVirtualPackages.delete('@ember/string');
diff --git a/packages/util/config/ember-try.js b/packages/util/config/ember-try.js
index b4d3235ff..9534f6aa9 100644
--- a/packages/util/config/ember-try.js
+++ b/packages/util/config/ember-try.js
@@ -47,22 +47,6 @@ module.exports = async function () {
           },
         },
       },
-      {
-        name: 'ember-beta',
-        npm: {
-          devDependencies: {
-            'ember-source': await getChannelURL('beta'),
-          },
-        },
-      },
-      {
-        name: 'ember-canary',
-        npm: {
-          devDependencies: {
-            'ember-source': await getChannelURL('canary'),
-          },
-        },
-      },
       {
         name: 'ember-default-with-jquery',
         env: {