Earlier quoted context omitted.
Can someone explain why a Mastodon account is so intrinsically tied to the instance it was registered on? This has always confused me and is part of the reason I haven't started using it, I couldn't decide on which instance to use. Why can't an account be globally unique and not tied to a specific instance? Why, as a user, do I have to deal with the low-level concept of an instance? Is this all just a consequence of…
because that is your identity, the full "user@domain" the domain you are on is an intrinsic part of addressing to get to your account. so the question then becomes why can't you change your name? and it has mainly to do with avoiding name conflicts in administratively isolated systems. A major problem in distributed systems is names. one solution is to do what dns did, you can have nice names but you only get to pick…
ENS (https://ens.domains/) solves this problem rather elegantly. A single source of truth that is decentralized so any app can use it without trusting anyone. It wasn't around when Mastadon was being built unfortunately but is useful for developers of new apps and protocols.