"At the heart of Matrix protocol, you have a kind of merging algorithm that reminds a bit of Google Wave. It means that a conversation is conceptually represented as a sort document you constantly merge on the server. This is a consuming process that is happening on the server for each message received in all conversations. That’s why Matrix has the reputation to be so difficult to scale."

#MickaëlRémond, @ejabberd, 2022

https://www.process-one.net/blog/matrix-protocol-added-to-ejabberd/

Fair comment @matrix?

#Matrix #Wave #ApacheWave

@lazarus @daniel #XMPP is still a thriving ecosystem with lots of good FOSS developers doing interesting things.

XMPP is also used under the hood in tons of products needing instant messaging even if they are not advertised as XMPP clients, or do not federate. But look at #Matrix, only 25% of matrix servers federate.

Anyway, all three share a strong focus on protocols, but there is a big difference: https://chatmail.at does not expose protocols to client developers, just a Rust SDK.