Depends on how you define that. Literally none of the communities I was part of on reddit have a functioning equivalent here.

Boston? Dozens of posts a day on reddit, maybe one a week here.

Burning man? I don’t even know if there have been a dozen posts in the community here.

Geology? Don’t think I’ve seen a single post.

Communities for specific bands (I’m a jamband fan) exist here but have no are almost no content.

And so on.

I’m the kind of user who comments often but doesn’t post much. With no one here posting, there’s nothing for me to interact with.

If you want echo chamber liberal political memes, obscure open source software discussions, or endless hentai, then lemmy is great. But it has no pull for people who want to participate in niche communities like mine. Hopefully it’ll happen, especially as reddit gets shittier and shittier, but even for people like me who desperately want to leave reddit and are willing to take a chance on a new platform, this is a tough sell.

It’s going to take a few more digg type events to really get lemmy to pick up enough users to make the conversations in the small niche communities hit critical mass. Until then, lots of people will give it a try, then bounce.