I use Limo, it takes some getting used to after using Mod Organizer 2 for so long but it gets the job done. I havent used it for any huge modlists yet though as it tends to be a little buggy/unintuitive sometimes.

There’s also a way to get MO2 on linux, should he on github as modorganizer2-linux-installer.

Neither, I still use reddit because the subreddits pertaining to my interests are still active. Lemmy is almost entirely political discussion and boomer Facebook comic strips from what I’ve seen, and most other boards pertaining to specific interests have low activity here. If that wasn’t the case I would be using Lemmy much more.