[wpasc]

I don't think that's an apt comparison. The difference in degree becomes a difference in kind IMO. HN doesn't send you alerts or notifications that are optimally spaced based on A/B testing. HN isn't personalized per user to maximize each individuals HN time. The HN top doesn't refresh on command and provide a fully new page on each refresh (new topics come up but if you refresh the page every 12 seconds you will see very little change vs any engagement app that always tries to give you something new).

HN can be a time draw, but it's based on a somewhat transparent vote/flag system. Features of other social media sites/apps like A/B testing, personalization, variably spaced notifications, daily digests to draw you in are features that are extraordinarily well designed for our dopamine-reward system.