WHATWG and W3C have an agreement now

source

@@ -300,13 +300,10 @@
 
   <p>In short: Yes.</p>
 
-  <p>In more length: the term "HTML5" is widely used as a buzzword to refer to modern Web
+  <p>In more length: the term "HTML5" is widely used as a buzzword to refer to modern web
   technologies, many of which (though by no means all) are developed at the WHATWG. This document is
-  one such; others are available from <a href="https://spec.whatwg.org/">the WHATWG
-  specification index</a>.</p>
-
-  <p class="note">Although we have asked them to stop doing so, the W3C also republishes some parts
-  of this specification as separate documents.</p>
+  one such; others are available from <a href="https://spec.whatwg.org/">the WHATWG Standards
+  overview</a>.</p>
 
 
   <h3>Background</h3>
@@ -436,9 +433,8 @@
   maintaining the specification rather than freezing it in a state with known problems, and adding
   new features as needed to evolve the platform.</p>
 
-  <p>Since then, the WHATWG has been working on this specification (amongst others), and the W3C has
-  been copying fixes made by the WHATWG into their fork of the document (which also has other
-  changes).</p>
+  <p>In 2019, the WHATWG and W3C <a href="https://www.w3.org/blog/news/archives/7753">signed an
+  agreement</a> to collaborate on a single version of HTML going forward: this document.</p>