Email has solved federation / decentralisation long before WWW.
Nobody is confused when you hand them a [email protected], [email protected], etc; I use my own [email protected] and sometimes get a blank stare, until people realise you can go to www.gmail.com to check your own inbox, and you can totally just type www.whatever.com into your browser.
Links like reddit.com/u/user, youtube.com/@user, already exist and are de facto a standard of some kind. If we stop trying to make @[email protected] a thing, the only obstacle is in convincing people that whatever.com/user is just another link you can click, and this is totally how they can reach you - send you a message.
Federation between servers is an entirely different topic, but for the purpose of this discussion we can assume it's just an implementation detail - just like SMTP is for GMail users.
I'm probably making this sound more trivial than it actually is, but IMO all you have to do is build up on existing paradigms and collective understanding.
Nobody is confused when you hand them a [email protected], [email protected], etc; I use my own [email protected] and sometimes get a blank stare, until people realise you can go to www.gmail.com to check your own inbox, and you can totally just type www.whatever.com into your browser.
Links like reddit.com/u/user, youtube.com/@user, already exist and are de facto a standard of some kind. If we stop trying to make @[email protected] a thing, the only obstacle is in convincing people that whatever.com/user is just another link you can click, and this is totally how they can reach you - send you a message.
Federation between servers is an entirely different topic, but for the purpose of this discussion we can assume it's just an implementation detail - just like SMTP is for GMail users.
I'm probably making this sound more trivial than it actually is, but IMO all you have to do is build up on existing paradigms and collective understanding.