I can leave the larger community, but I do miss a couple subreddits.
The good thing about the Reddit before the dark times of 3 weeks ago, was that it had a large enough user graph that there were enough people with niche interests to have an active community. Facebook also has this critical user graph.
The good thing about ActivityPub based communities is that there is the potential to have much larger federated user graphs than the individual closed business-based platforms.