They are a LOT more focused in tech (free tech specifically), not many of the interesting conversations here would be welcome there. Also, they allow new accoun

They are a LOT more focused in tech (free tech specifically), not many of the interesting conversations here would be welcome there. Also, they allow new accounts only if existing account invites them - thus severely limiting the number of “btw I’m the creator of X that you talk about, let me tell you my story” type of comments that are abundant on HN.