Can 2 people have multiple relationships? If yes, why DM between 2 people has to be in the same flow? Separating flows based on relays can capture this perfectly. I might want to talk about personal things in relay A with my friend X and talk about video games in relay B with X.

Identity is npub and role is kind0. They don’t need to be the same.

Also, why can’t we subscribe to different people in different relays? Why merge follow lists?