Passkeys are starting to become commonplace nowadays. A good integration with a passkey manager like Bitwarden in order to store one's name would be fantastic. Perhaps something to hold off on until FIDO finally standardises passkey exports, though. 

 Explain the use case, not the protocol. You don't explain Facebook's infrastructure to prospective Facebook users, you just show them how to post pictures of their cats and tag their friends, because that's the value proposition. That's what makes that platform useful and relevant to their life.

The primary distinguishing features / use cases for Nostr vs. something like Facebook are that Facebook Inc. decides how to curate your feed, it's centrally owned/controlled, and might end up defunct in the future, whereas Nostr has none of those qualities and puts control back in the user's hands.

If the person you're talking to about Nostr doesn't care about those things, or even has good or personal reasons for *preferring* Facebook's qualities, then so be it; let the network effect do its thing and just tell them that you can be found on Nostr rather than Facebook. If you fancy taking a stab at persuading them to change those preferences or just sharing why you have your own preferences, feel free to go for it, but appealing to the technology is rarely relevant or persuasive. Appeal to the personal impact instead.