I will get shit for writing that, but Matrix in its current form shouldn't have seen the light of the day, nor should have been let to spread with close to no technical scrutiny and based on empty promises/hype like it did.
Just to be clear, I'm absolutely encouraging, in fact, actively promoting federated alternatives to things like WhatsApp, Messenger, Signal, Telegram, …
But I don't believe for a second that the foundations on which Matrix is built make sense, can be made to work well in practice, nor represent a problem worth spending so much time and effort solving. This article does a good job at introducing the "behind the scenes" of the protocol: https://telegra.ph/why-not-matrix-08-07
The whole history of Matrix can be summarized as:
- "let's do this because it's cool"
- "shit, it's hard/slow, but we will figure it out"
- "I have a breakthrough, here comes a new version of the protocol/client/…" (the ecosystem reboots)
(rinse and repeat)
Matrix has seen more incompatible reincarnations of itself in the last 5 years than XMPP in the last 20. Arathorn, its lead contributor and evangelist will keep apologizing, promising that this time they have their stuff in order, that whatever buzzword will solve this or that aspect of the problem, while the elephant still is in the room. You practically can't tell apart arathorn's messages of 2015 from those of 2022 and that would be funny if it wasn't so sad.
IMO Matrix is broken beyond repair, while XMPP is quietly used by millions of users. I wish Matrix could carry its own weight and be so unambiguously better that we wouldn't need competing alternatives there. To me, the better XMPP is XMPP itself, and I'd be happy to elaborate on that.