I am not sure if this is @`fiatjaf's concern, but for me, what is utterly important is that users understand nostr like they understand email; and like they understand email providers and email clients. We don't have to lecture people on how nostr works. What we need is to provide uniform identifiers like "Email" and "example@email.com".

I am not aware of any nostr clients that don't mention Nostr, but this was a bit of a dilemma for us when crafting the messaging and UX for new users. There's a cognitive overhead to dealing with two things: "What's this Primal thing? What's this Nostr thing?" We decided the cost was worth it and leaned all the way into Nostr messaging.