Neither, I still use reddit because the subreddits pertaining to my interests are still active. Lemmy is almost entirely political discussion and boomer Facebook comic strips from what I've seen, and most other boards pertaining to specific interests have low activity here. If that wasn't the case I would be using Lemmy much more.

Discord needs some serious competition soon, its been going downhill for a long time now. I would use matrix or revolt but the issue is getting my friends to switch to them.