part of this is adding support for the new exactOptionalPropertyTypes option, and part of this is your config just being stricter than ours 😂. really it just looks like it wants us to add a bunch of defensive checks. i'm looking into addressing this now.

for reference, here is our compiler options:

{
	"lib": [
		"es2017"
	],
	"target": "es2017",
	"module": "esnext",
	"moduleResolution": "node",
	"downlevelIteration": true,
	"esModuleInterop": true,
	"noFallthroughCasesInSwitch": true,
	"noImplicitReturns": true,
	"noUnusedLocals": true,
	"noUnusedParameters": true,
	"removeComments": true,
	"resolveJsonModule": true,
	"sourceMap": true,
	"strict": true
}

@eleith heads up as addressing this may have a minor perf effect

Has same problem.
Solved changing from vue-cli to Vite.

(ps.: only did this because I am working in a very small repo)