@nathanael @socketwench Many reasons, acrually.
If evrything is encrypted, then that fact ceases to be remarkable. More chaff, less wheat. More noise, less signal. It also becomes less special and people stop treating it like uber secret spy comms for ultra leet opsec. It's just chat.
But it also keeps plaintext off the server. Service operators don't get legal demands to surrender evidence they don't have. It makes federation less risky for smaller nodes.
It also makes E2EE table stakes. Which means services that follow suit have less data to get breached, or to train an AI on.
Ubiquitous enceyption is just a damn good idea.