Disappearing messages are due to land this coming year - https://github.com/matrix-org/matrix-spec-proposals/blob/matthew/msc2228/proposals/2228-self-destructin

Disappearing messages are due to land this coming year - https://github.com/matrix-org/matrix-spec-proposals/blob/matthew/msc2228/proposals/2228-self-destructing-events.md https://github.com/matrix-org/matrix-spec-proposals/blob/mat... is the spec for it. For metadata protection, we're relying on P2P Matrix (https://arewep2pyet.com https://arewep2pyet.com) - as if there are no servers (or if the servers are dumb store & forward servers like Signal's) then there's very little metadata. And yes, S&F servers could replicate sealed sender - or even rattle through a mixnet to provide proper traffic analysis resistance (so better than Signal :)