r/WhatIsThisThing, r/TipOfMyTongue, and similar subreddits. Some of the simplest and best examples of the power of crowdsourced knowledge. Take a simple question with a simple answer that is basically impossible to search through conventional means, but through the power of those communities you can get your answer in minutes. Simply amazing.

Lemmy is going to have to get huge before it can really replace them. :/

The very specific animal subreddits like blurrypicturesofdogs or catsinwaterpackages. Always fun to find new ones or suddenly see something pop up from one of them again.

Well first off, I'm gonna miss my favorite nerdy subreddits. r/wow, r/Morrowind, r/Oblivion, r/Skyrim, r/Elderscrolls, and even r/trueSTL. Happy that Skyrimmods is here though!

Aside from that though, r/botchedsurgeries, r/amitheasshole, and r/hobbydrama.

The rest would be various animal subs, but hopefully, they find new homes quickly.

I think losing the ability to lurk in active communities of people I disagree with politically. I would never engage as it didn't seem right, especially down/upvoting, but It was always interesting to see things from the other perspective.

So places like r/tories, r/conservative, r/prolife, r/liberalgunowners - as a guy from the UK a lot of the subjects discussed in a few of those didn't affect me but I always prefer seeing things from both sides (even if I would never agree with them)

I'm not going to miss any, because we are going to recreate them here! :)

The vinyl releases sub. It's how I built my collection.

Am I The Asshole and all the crafting subs - quilting, sewing, cross stitch

So many...

Wallstreetbets, NonCredibleDefense, all the comedy and podcast subs dunking on Joe Rogan. Last couple years though I got heavy into NFL Meme War subs. Those had some top tier content during the NFL season.

There was a lot of leftist communities on reddit that I hope survive in some form fuckcars, antiwork, fucklawns, breadtube.

I’ll definitely miss r/worldbuilding. Lots of people making cool stuff on there.

Is there a way of finding popular communities across the federated lemmyverse? And on a smaller scale can I find popular communities on my instance?

Edit: leaving for posterity, but! there’s a “local” and an “all” in the communities browser: https://lemmy.world/communities/listing_type/All/page/1

/r/footballhighlights

If Liverpool played at 2 in the morning in my timezone, it didn't matter because I could avoid spoilers and download the full game to watch after I woke up. Not to mention that I could then share it with my granddad, too.

r/GymMemes

Easily the most goofy subreddit I had the pleasure of being in.

r/tooktoomuch

i'm going to miss r/duggarssnark, r/askoldpeople, r/xennials, r/talktherapy, r/leopardsatemyface

/r/skeptic

Definitely whatisthisthing. There was a truly specialized group of finders there who're unlikely to make the move.

For me it's the German ones. I moved to Australia in the late 90s, and they help me keep up with things a tiny bit, so the culture shock isn't too big on my rare outings back home.

Also cats. Cats are nice.