Nostr has few problems right now, it is difficult to switch between clients at times because they do not load all the posts completely. Thus space is very much cluttered. Secondly, it is in development phase and way more updates required.

Thirdly, Apple stopping Damus could be a major setback, not because Damus but because of stopping a service like Nostr/Damus. Lastly as referred in another reply, there is still huge amount of public over those sites and many of them might not switch from them for the next few years at least.

But again, we will grow, consistently, ain't like a hype which could potentially kill us in a long run from gaining users.

Elon just gambled on twitter. IMO