We are in the era where nostr is mostly about copying things that already exist, with bells and whistles.
Watch the language of people talking about it: They basically want to beat the system in their own corrupt game.
Forget it. Never going to work.
Instead, think of new things to try out. Even if it fails. "Substantially different" is not about something alien.
It is the same need or want, served in a better way, for **some** people. The people you want to serve.
My 2 sats.