Exactly, and there’s honestly no need for them to have 100,000+ people in them either. 1,000 people goes a long way too. There’s a point of critical mass when you can have sustained discussions and there are enough upvotes to form a sensible feed by popularity in the community, and that critical mass isn’t that huge IMHO. There also often comes a moment when greater popularity is detrimental and worsens it.

I could also jump onto Lemmy almost right away as my most loved communities were already forming here. I think Lemmy has a better outlook than Mastodon in this regard because the community is waiting for you, rather than Mastodon is expecting you to form your circle, which can take a lot of effort in the midst of fediverse confusion.

I think most who want NSFW in their feed simply subscribe to things from here https://lemmynsfw.com/

It’s an instance only about NSFW. Elsewhere it is rare, yes. I think that’s honestly good for Lemmy.world and others. Even if OP’s suggestion on image hosts is good, if it blows up I expect a ton of people will begin uploading 4K porn directly on the instance.

So, anyway, as usual with subscribing from another instance, you go here and search for !boobs@lemmynsfw.com if what you need is more boobs, then subsribe to that and voila it’s as if it was here on lemmy.world.