If you're attracted to Bluesky by the promise of account portability, then I think it's important to understand what that entails. Because one of the claims they're making is that you'll be able to rescue your account in the event that your home server suddenly closes. But how would that work? How do you migrate an account from a server that's no longer accessible? And part of the answer has to be: Well, you don't. Because it lives somewhere else. 🧵 1/?
The first thing to understand is that BlueSky servers aren't entirely analogous to fediverse servers. The protocol docs call them Personal Data Servers (PDS), and they handle only a portion of what fediverse servers would handle. Mostly they deliver personal interactions between accounts—"small-world" networking, in the jargon. The rest of your account—your network identity, really—is stored elsewhere. That has implications you should really pay attention to if you're thinking of joining.