I scanned quickly through the comments here so I may have missed any mentions, if there were any... But my suggestion is: there should be a master/stickied list of equivalent subreddits. So in the future, people can just google [subreddit name] + lemmy (or kbin or beehaw etc etc).
Preferably the same exact subreddit name. Or are those subreddit names owned by Reddit? Can they come after us?