Doesn't XMPP check all those, and more? I run my local _ejabberd_ for a decade and some, and I'm joined to a couple 100+-users rooms. On my phone, I have a what

Doesn't XMPP check all those, and more? I run my local _ejabberd_ for a decade and some, and I'm joined to a couple 100+-users rooms. On my phone, I have a whatsapp-like experience with _Conversations_, that even the least tech-savvy in my circles use happily. On the laptop, I have _Gajim_, which is more "banquet-style" and serves to follow along fast-paced large rooms, most of which happen to be on IRC, but I don't even mind that, thanks to the _biboumi_ bridge which unceremoniously connects me there as if I was a regular IRC client. I also keep an eye on _movim_ which promises a more discord-like experience: it has gamers-style voice/video/screen-sharing rooms, it has spaces (although the paint isn't completely dry on those), and it's working on scaling-up calls to very large rooms by having galene as a SFU. What I find also amazing in all this is that all the client/server/bridge names I brought up are independent and healthy projects. XMPP is very mature and decentralized. Not just in theory by nature of its protocol, but practically/politically by its many implementations across many stacks and implementers across many countries.