I think if Nostr solves some need for SN, then it makes sense to integrate, but integrating just for the sake of integrating (bringing another dependency) is bad idea in my opinion.

So far I think the main problem nostr solves is censorship resistance for broadcasting (ie twitter), because the relays are simple and users own their ids (much better than mastodon). So that's something SN could get from nostr, although I think it will bring many interesting challenges.