Sure, but deconstructing the platform to look at the engagement points is also useful. Some things that I think set HN apart in a good way:
The lack of any kind of personalization whatsoever on Hacker News is a huge differentiator. There are no notifications, so if you want to find out if somebody replied to you, you've got to go check. Everybody's front page is exactly the same. There are no direct messages. There are no in-line images or videos or even emoji. The feed is not endless. There is no targeted advertising. There are no reactions to posts other than upvote/downvote.
I guess you can lump HN in with Instagram and TikTok, but it just feels like a very different product, in ways that are relevant to the analysis of whether its existence is a net positive for society.
> if you want to find out if somebody replied to you, you've got to go check.
Let me spin this a different way: Because there are no notifications, HN users need to frequently come back and check. This is "positive random reinforcement" and is one of the most powerful mechanisms known for creating and maintaining addictive behavior. It's the same principle that slot machines and loot boxes use.
> There are no direct messages.
I'm not sure why this is good or bad, but it's not really true. Many people (including you and me) put their email address in their profile.
> The feed is not endless.
The feed is definitely endless. If you mean specifically that it's paginated rather than loads automatically... do you really think it matters? Like, you think that HN quality would suffer if users didn't have to click the "more" button?
I don't think HN quality would suffer, just as I don't think FB quality would improve by adding a "more" button.
> There are no reactions to posts other than upvote/downvote.
Upvoting, downvoting, and commenting are HUGE social functions. Facebook doesn't even have downvotes. You could easily spin this as a major social negative for HN. You downvote other people!?! Sounds toxic!
The other points (frontpage, images, emoji, advertising) are interesting but honestly I'm not seeing how this makes HN something fundamentally different. It does probably make HN appeal to a different audience. Which is the point... but don't confuse "great audience" for "better social technology".