The case I found more worrisome is you follow someone, they then start using a new domain, and now it seems you're following a different handle (IDK if handles are immutable in Twitter, maybe they are not?).
Maybe BlueSky could offer a registrar that would do steps 1 & 2 for you transparently upon domain purchase.
Maybe BlueSky could offer a registrar that would do steps 1 & 2 for you transparently upon domain purchase.