@QuadRadical From my experience, Dino has a great user interface is extremely disappointing feature-wise. I would not recommend using it if you can just use Gajim.

Also, uhh, about that other part...

As you're probably well aware, Matrix is focused heavily around rooms instead of DMs - DMs are actually just rooms. XMPP is the other way around - DMs are the main focus, MUCs... less so. I try to avoid XMPP MUCs because I just don't want to put in the effort if it may or may not work.

@QuadRadical It works pretty well for DMs, but if multi-user is your main focus, it's okay but not great.

While it has no E2EE, IRC works quite well for multi-user things and works on basically any platform you can think of.