http://qvt3o2ipzxx3gtoyafd3ptqwsxjs52enlwlxuryn2xjkm7hnp5icd6yd.onion/coyim/whats-new-v04/introduction/2022/02/16/whats-new-in-v04-muc.html
For all these reasons, we are very happy to announce that in version 0.4, CoyIM supports the most important aspects of
the XMPP Multi-user Chat protocol. For the moment, this support follows the protocol quite closely, which means that it
will sometimes look a little bit different than in other messenger applications.