@openess@skrivel.se I am running an own XMPP-Server since 2008. The main difference between XMPP and Matrix is for me that Matrix doesnt erase (automatically) messages from the server, but XMPP does. So a Matrix Server increases its size of database, XMPP does not. Matrix has, afaik only element as useful client. XMPP hat more, for example conversations (Android), monal (iOS) and gajim (Linux, MacOS, Windows). Maybe there is also a client for a C64 ;)