Moved most of my stuff there a while ago, has been pretty great.

Huh. I’ve played around with D a few years ago… don’t exactly remember his opinions coming to light, but I can’t say I’m surprised either.

Google’s extension of RCS does do e2ee, which raises the question of “what happens to security when you talk to a non-Google user”…

The real core difference is that XMPP just passes messages around (and history is just bolted on as an extra thingy between you and your server), while Matrix is literally a federated database of message history.