Roborock or robovac, would be nice to keep up to date on new products and share troubleshooting info with other robovac owners / shoppers, but building that community here isn't a task I'm up to.

Would have to say the r/imaginaryelections and r/imaginarymaps communities for alternate history. If anyone knows any lemmy/Mastodon communities for that it'd be appreciated!

I would love to find a roadtrip community

Niche communities, like one for the specific car I own. Also more car communities in general. I'm so tired of the Fuck Cars mentality here.

WallStreetBets

/r/webdev and /r/formulae are the main ones I miss.

cricketshitpost

A lot of the location-based Ask subs. A lot of the Ask subs in general.

but mostly r/WhatsTheWord

I wish the hockey community would move over. The GDTs are dead here.

Something like KarmaCourt

r/gambiarra, funny brazilian subreddit about gambiarras (quick fixes/epic life hacks)

etymology

i rather miss ennnnnnbbbbby, was a real good nonbinary meme subreddit, but as i left reddit, no more :(

Less one that I'm missing, more one that I'd like to see more lively and recognised by other communities outside of Lemmy:

Factorio

As well as a few other games.

It's a fairly technically minded game, which'd make it a great fit over here. In fact, there is a Factorio Lemmy community, it's just nowhere near as lively as any Factorio subreddit.

Pokémon TCG subs- they’re here, but not active really.

RVLiving