I’ve thought about it a bit and the Fediverse has been around for a while now. There are some really cool applications being made to replace the mainstream ones, but they just aren’t taking off.
Why do you guys think that might be? Ease of use? Addiction to the mainstream platforms? Lack of marketing?
This does not solve the problem of reliability. Also, better solutions are possible: Briar, for example, does not require a server to store and forward (cleartext) messages.