The "email" version - your work email is for work and personal for personal. The @x part certainly confers an authority and verification of sorts. But when it

The "email" version - your work email is for work and personal for personal. The @x part certainly confers an authority and verification of sorts. But when it comes to social networks, part of the idea at least seems to be broadcasting and merging of identities. Back in the day / still barely in existence - keybase cross verified your identity on multiple platforms, and I suspect that in a federated world this function becomes more important and probably needs to exist even more than before.