Censorship. All the major subreddits became political echo-chambers. Reddit was founded on free speech and open discourse, especially when it was really uncomfortable. I'd love to see the same for Lemmy. Over the years I've seen authoritarianism creep into the moderation policies of most major subreddits. Today, even posting on the wrong subreddit is grounds for being banned from dozens of major subreddits. Even having a polite disagreement about, for example, anything to do with "trans," is grounds for being banned.