I really wish the Mastadon README had some more discussion about what exact problem the system is designed to solve. Closest I can find is "A decentralized solution to commercial platforms, it avoids the risks of a single company monopolizing your communication."

Which is great and all, but... what does that mean exactly?

As an end user, I expect that to mean something like "when the org/entity that shuts down the instance your account is on decides to shut it down, your account/data/history is safe/recoverable, and easy to move somewhere else."

But it doesn't seem like that is the case now, and the README gives no indication at all if that is actually the long term goal or not.

@esnyder I'd like to know about data/timeline redundancy also. I assume it's stored to the instance where you're registered & reliant on the host for backups. I haven't looked to see if there's an option to let me back up my archive yet.
@frankiesaxx as far as I can tell the 'export' options in preferences are limited to "list of who you follow" and "your block list" at the moment.
@esnyder yeah, if there's somewhere to do a whole message archive, I haven't found it.