XMPP felt great when compared to Matrix. Matrix was in a bad state some years ago when I hosted it for a while, and seems like it still is the same messy state. I avoid it as much as possible but for some reason there are communities using it.

At this point it should just die so people would be motivated to replace it with something better.

Now you can feel twice as broken. That is what new, modern standards deliver. Is this part of XCD #927 or another one, too?