[AshamedCaptain]

Ironically I think the absolute opposite. An XMPP server is something I can install on my ten year old home server without a second thought ( you have several to choose from even in debian's repositories) and expect it to work with minimal config.

Matrix servers? You have mostly one implementation to choose from and it comes "packaged" as a monster container with several python modules likely already with CVEs and god knows what else. And then the resource usage...

[shadowgovt]

Yeah, it's great. One package that works and already knows all its dependencies. And thosev exploring the CVEs should generally find themselves in a chroot jail so not too much to worry about.