Nostr login has two values obvious.

1. password entering needless

2. payment info entering needless

1 differs from OAuth in that there is no centralized identity provider, but is similar to Passkey.

2 is the zap and makes payment services like PayPal and stripe substitute.

Identity and payments are two very close areas of web standards. Many specification bodies and experts cover both together. And Nostr login provides them together.

This is something only Apple/Google can do, as far as I know. Of course, there are many things like LNURL-Auth that do this, but in terms of actual and popular use. As an aside of other methods, I think the default route in Japan is to do this with My Number Card and CBDC.

On the other hand, i guess it's difficult for existing web2 services with OAuth button to replace to Nostr login, because they often get login user's email address from OAuth provider and make it identifier.

I think we will create a paradigm shift as users gradually choose services that provide new value.