I’ve been trying to use Matrix to replace sites like Discord or Slack. But it seems that if a user creates an invitation-only room in a server, then invited users who are registered on other servers get errors when trying to join. Not very useful error messages either: “Failed to join room”. (In my case, I tried creating accounts and rooms at nitro.chat and then at converser.eu, but friends registered at matrix.org don’t manage to join).
Quite a let-down. Anyone who’s facing the same problem and has maybe managed to solve it?
That’s why I said “would”
You also said “they are hinting at XMPP” when they’re not even hinting at adding federation.
Below the sentence you quoted
Yes, I read the whole thing, thanks. However it’s listed right next to several other (basically every) option and if it’s not even on their roadmap, it’s guaranteed not to happen for many years, if ever.