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'm not deep into the federation stuff just yet, but it seems (perhaps naively) that each node that knows about you would have a pretty solid record of your account (at least public account) recorded.

The difficulty would be taking that and turning it in to a full-fledged local account. How to transition/assume control, how to represent/propagate the transition, etc..