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Re:Drawbacks of P2P and a defense of Signal by rcxdude on Sunday January 31, 2021 @07:10AM (#25978224)
It's a fundamentally different approach. You could in theory build it on top of XMPP, but it wouldn't actually interoperate sensibly, so what's the point?
Re:Drawbacks of P2P and a defense of Signal by lapinot on Sunday January 31, 2021 @07:39AM (#25978362)
> It's a fundamentally different approach.

Is it? (genuinely curious) Can't one see the matrix server-server state synchronization protocol as a transport layer for MAM archives? And pubsub nodes in XMPP are very matrix-room-like. This could be an XMPP extension allowing to multi-home pubsub nodes.

Also, there are recent matrix proposals [*] for representing several things (groups and user profiles) as rooms. Given the analogy room=pubsub, the user-profile-as-room seems to be the same thing as XMPP's PEP (used to share personal data, like public keys or avatar). And the group-as-room would be the MIX proposal.

[*] https://github.com/matrix-org/matrix-doc/blob/matthew/msc177...

[*] https://github.com/matrix-org/matrix-doc/pull/1769*