That's a great article. I linked to it in the OP:
The same is true with Google's adoption and then abandonment of the XMPP protocol, which is also often described as EEE. I don't think that's the right way to look at it; for one thing, XMPP is still around, and thanks to adoption by Zoom and others it has hundreds of millions of users – or billions, if you count WhatsApp'a non-standard derivative version. But in any case, whether or not it was EEE, Google didn't go into it with a goal of killing XMPP. They just wanted to exploit XMPP to address a business problem of making Google Talk successful – and did so, until it wasn't useful to them any more.
Yep, I've said for a while that if a schism with transitive defederation happens, it'll be a good thing. There are many fediverses!