> They’re calling it "opt-in," but it doesn't look like that's actually true? You can’t know whether someone you’re talking to -- who may not understand the implications -- has enabled it. In group chats, it looks like a single person turning it on eliminates signal protocol for everyone in the chat.
TBF Signal already supports automated key-protected backup (and has for years), it's just stored on-device, but there's no way to know what the other party is doing with that on-device backup.
