Also worth pointing out that Jitsi isn’t a standard protocol (AFAIK), but an open-source library. Matrix, the protocol, doesn’t actually have support for video/voice chat.

Matrix has great native support for voip/video, including conferencing: https://element.io/blog/introducing-native-matrix-voip-with-... etc.

Ah, I didn’t know that. I’m not sure I consider that “great support.” It looks relatively new, and from the blog post it seems the spec is still in proposal and development stage. It’s not implemented in any of the chat clients either.

Excited to know it’s on the way though.

Well, it's 'great support' in that i use it as my daily driver instead of Jitsi without problems. The spec is indeed still in proposal, and it's currently being integrated into Element Web/iOS/Android. Meanwhile Matrix has had native 1:1 VoIP/Video calling since 2015.

What's this then?

https://spec.matrix.org/v1.3/client-server-api/#voice-over-i...

Ah TIL. Matrix can be used to setup a WebRTC session between two participants. But that looks like pretty rudimentary. Do any chat clients use this? I thought Elements used Jitsi.

This is how 1:1 calls have worked in Matrix since 2015 - predating even Vector/Riot/Element.