> It's a fundamentally different approach. Is it? (genuinely curious) Can't one see the matrix server-server state synchronization protocol as a transport laye

> 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/msc1772/proposals/1772-groups-as-rooms.md https://github.com/matrix-org/matrix-doc/blob/matthew/msc177... [*] https://github.com/matrix-org/matrix-doc/pull/1769 https://github.com/matrix-org/matrix-doc/pull/1769*