[captaincrisp]

> This problem is created by tying accounts to instances.

That's a huge issue. My identity should not be tied to anyone but me. This has to be one of the biggest things that scares (admittedly more knowledgeable than average) people off early when they're required to pick a server. Mastodon's "don't worry you can move servers later" is better but still not frictionless, and does not work unless your source server is still online.