I'm missing pretty much all the "League of Legends Mains" communities, especially ADCMains and SamiraMains. They were one of my absolute go-to subreddits and the only reason I haven't fully deleted my account yet.

Other then that it's mostly niche things, especially very niche wholesome fem-oriented NSFW subs

The various personal finance related subs. There are some communities with similar names, but the depth of experience is lacking.

It's the lack of really small, niche, but still relatively active communities that is the biggest loss for me (so far). For example, I want to to talk about Brentford FC, a tiny English football club which was only promoted to the Premier League a couple of years ago. But we're a million miles away from that when there are exactly two communities for general soccer and one community for Liverpool FC, all three with exactly one subscriber.

Any other Bees fans out there? This Flekken guy seems pretty promising, even if I had hopes for Alban Lafont.

PublicFreakout. I love cringing at the worst people in society

destinythegame

I miss /r/opensuse and an active Java community. There are a few Java communities on several servers, but they are all basically dead.