For some of us data loss is often a bigger threat than unexpected retention.

I like Signal and it always makes me happy to see more people showing up there, but for now certain group chats will stay on other messaging services.

That’s fine. But Signal should then advertise itself as unsuitable for general-purpose communication, primarily relevant when someone is specifically worried about adversaries reading the communication.

I can see how this makes sense for journalists, dissidents, diplomats, criminals, corporate executives, etc., but if data is under threat of disappearance, regular people should be warned away and told to use something else for day-to-day communication.