Glad to see an alternative is gaining traction! The inversed colours for up and downvotes will take some getting used to!
To double-check that I understand Lemmy correctly: the equivalent to a subreddit is a server, right? So within lemmy.world there aren’t necessarily subforums/topics/subreddits.
Not really, the equivalent is communities. Which can be on any server they want. So for example there's [email protected] and [email protected]. the hope is eventually people gravitate towards one and others are discouraged from being made (so as to not split the community) unless there's some drama or need to have two.