There are OTR / OMEMO implementations out there for private queries. For rooms, I'm not convinced that we need full Olm / Megolm style encryption in most wider

There are OTR / OMEMO implementations out there for private queries. For rooms, I'm not convinced that we need full Olm / Megolm style encryption in most wider chats - encrypting messages across 200 individual parties with a magnitude more individual clients is perhaps just yak-shaving. I even learned today that irssi has an OTR module by default! On Debian systems you have to install irssi-plugin-otr but once you have that and irssi you can just `/load otr` and `/otr init` in a query and that's it, you have E2EE. This is handled client side though, so I suppose if your clients cannot agree on a protocol you'll be left with nothing. I'm not sure that's really the responsibility of the server though, since we're talking E2E after all.