I joined because Reddit has become a cesspool of bots and toxic behaviour. Lemmy is still completely open-sourced, while Reddit isn’t at all now. Also, when you first sign up on Reddit currently, you get completely ignored now and can’t post or comment on regular subs.
One of the biggest reasons i stick around, is just the slower pace and lack of algorithms. If i check in the morning, there’s a good chance that the same content will be trending in the afternoon or evening so I’m less inclined to scroll.