Not sure I would say that.  Nostr has become fairly centralized.  What I think bluesky was able to do, that opensats wasnt, is invest in infrastructure, so that they had capacity for a million new users in 3 days.  We all know nostr relays dont have that capacity or scalability.  Also I think they had quite a bit of luck there.  However, I am optimistic that #ditto has some great growth potential for nostr.