My problem with reddit is the censorship by community moderators. If the subreddit has a particular bias, any dissenting comments are deleted by moderators with no sign of their comment having ever existed. This varies from subreddit to subreddit I imagine. For example on wallstreetbets, you'll rarely see advice not to invest in meme stocks.

I'm a voice actor with an interest in tech. So, Reddit scratches itches that never even come up on HN's radar (unless, of course, it's a tech specifically trying to put me out of business, which there is plenty of).

So... why not both?

Yes

Different platforms with different goals.

Neither. 4chan is best.

Neither. But Hacker News' pathological fear of "turning into Reddit" has always seemed weird to me.