Since clients don’t have a concept of relay sets for organizing public/private content is the move at this point creating multiple profiles? Seems counter to the promise of portable identities, but relays tied to identity is an unintentional blocker to better management of data sources.
Discussion
We haven't solved that yet. But I think we will end up with several separate keys that represent each identity in a different app.
A standard for mapping npub > app > relays would be a really useful structure because you would be separating relays by concern while facilitating app discovery between users.