Yes but Nostr is mostly a maxi community which is very niche compared to lemmy. These smaller Reddit-like clients are every more niche. Since most of those forums are incompatible since there isn’t a standard, that’s even more of a niche. At that point, what’s the point? Matrix and SimpleX might be niche but they have a large Monero communities. Reddit and X have large communities that don’t care about being managed. Nostr currently has a twitter like community for people that like interacting with maxis. Lemmy had a place for reddit refugees who still liked the concept of reddit where different communities could stumble on each other.