Lol no. I like being able to send messages to someone who isn’t online at the same time
Yes. Asynchronous communication is dependent on both users servers software and config. And that’s exactly why XMPP is disused.
It went out of popularity for a reason. I’d love a new protocol with XMPP’s mistakes fixed.
BTW, OMEMO highlights one of those - it’s not as good as Signal by which it is inspired. Basically no metadata protection, which means that it’s as good as OTR with multiple devices.
Some kind of Signal with federation (and good clients, not like signal-desktop) would be interesting. Maybe even p2p with some kind of relays (like in NOSTR) for history, offline messages, some kind of Telegram channels and such.