@mattj So I'm quite sure a Matrix server that is used only to access small rooms can perform quite well (maybe not quite as well as XMPP though 🙃).
But XMPP doesn't currently have a good answer to Slack/Discord-like UIs in the ecosystem. Eyes are on https://prose.org/ as a hopeful solution though! @moanos@jr@shxdow
@moanos I'm an XMPP person (e.g. I founded the Snikket project). I think I would objectively recommend Matrix/Element to people looking for something like a self-hosted Slack or Discord, while I would recommend XMPP/Snikket to people looking for a self-hosted WhatsApp/Telegram/Signal/etc.
The main complaint I hear about Matrix from people switching to XMPP is that the servers are too heavy on resources. I know that Matrix scales differently to XMPP though (by room and not by user). @jr@shxdow