Matrix was built to become the open communication of the web and serve everyone. But, as the Internet and email did, its network effect started with governments. Today, and as proven by the audience in the room, most European governments and several others are either using it or looking at implementing it for their communications. This talk will tell the story of how we got there and why.

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[–] u_tamtam@programming.dev 2 points 4 days ago

I've said that before, but the O(N²) issue with E2E encryption only exists in an ideological sense. If your group chat is large enough that the overhead is unbearable, you don't have a private and secure group chat to begin with, just because a group chat of this magnitude is very much public by definition.

With that said, you can keep server logs encrypted while avoiding the payload/key rotation explosion by using static keys (available since forever with PGP in XMPP) or wait the decade (but most probably, the eternity) that it will take for MLS to be bolted on top of Matrix (and the new protocol design that this entails due to the absence of guarantee about messages ordering)