Nostr is the protocol, the base project that sits under a lot of smaller projects.

I'd guess that at least 2/3 of the nostr projects have already failed. Some barely even brought a client to market before being wound up or fading into obscurity.

The most popular projects are smashing it by iterating & building on top of their successes. New projects for other use-cases are constantly sprouting up & fizzling out. Only the best survive, but the protocol remains & your npub allows you to play in them all with very little cost. The protocol & the idea is more resilient than the apps that are built on top to interact with it.

Nostr is inevitable, what's uncertain is how we'll all use it.