@rysiek it seems like a lot of people do, but don't open up their servers to external clients. I'm not sure why.
What worries me is that this is a pattern of failure for open protocols. I'm not sure what we can do differently to avoid it.
There are several potentially large Mastodon servers that aren't federating as well.
@ted @rysiek yeah, I don't think many people are using Jabber as-is anymore. Google Talk/Chat/WhateverItsNameIsNow still supports it though (at least for some things), and apparently so does Zoom, not sure about the MS stuff.