Exactly what I was thinking. Feels like if this takes off, there will be a "land grab" like any single-domain sort of thing. So effectively, this is the equiva

Exactly what I was thinking. Feels like if this takes off, there will be a "land grab" like any single-domain sort of thing. So effectively, this is the equivalent of just exchanging a phone number for a username, and that might not be an improvement. Kinda weird.