I think @keychat had a better nostr based solution but @SimpleX remains my best bet overall. But fully agree with centralization making Signal a liability

This was mind blowing. I discovered it about a decade ago. I had cancer over 30 years ago and I've come to the conclusion that it was entirely avoidable and that my so called treatment was more harmful then the disease.

Moral of the story, don't put your data in things you don't control and you don't actually own devices locked into cloud crap