> Anyone can host a server and talk to anyone on any Matrix server.
I host my web, my email, my XMPP, my TURN/STUN, etc, so I gave Matrix a try. In short: it's horrible. It's insanely resource hungry, both synapse and dendrite, plus dendrite is so not finished it hurts.
Stick to XMPP until Matrix is in an actually usable shape when one doesn't need a small power reactor to run it.
When was the last time you tried? My Synapse is stably hovering around 400M RSS with about 10-15% CPU usage. It has about 20 active users, each with 2-3 devices and is joined in hundreds of rooms on the federation.