I have been on reddit for just about 12 years now. Something I've noticed over time is just how hateful the place has become. A complete outrage machine. Every single sub became filled with it. I've filtered so many subreddits over the last few years, it's insane. I don't know enough about this place to be sure, but I do hope it doesn't become the same type of echo chamber of anger.
Anger is an extremely effective way to spread an idea.
Posts which incite emotion in you make you engage - upvote, comment and share. CGP Grey (a redditor himself) made a great video about this a while ago.
We can only hope Lemmy users are more self-aware, and choose to engage with things they enjoy more than things they hate. But given human psychology, it's unlikely...