I'm convinced that procrastination is not the problem with social media - it is FOMO. In this regard social media are not all equal, there is a hierarchy. In this way hackernews as social media is nearly a misnomer, I am not being projected upon by the perfect life of a billion people, algorithmically picked by my insecurities.
What if you miss out on some amazing kernel of knowledge (that also happens to confirm your biases)? You'll need to read every 500 comment threads to find out!
Yeah the problem with these (pipelines, compilations) is they last long enough to take some of your time but not long enough to, say, read a full article, complete a tutorial, watch an educational video from the beginning to end etc. So HN somehow falls nicely in there.
Waiting on someone to join a meeting. Which, to be fair, since COVID is much less of an issue than it used to be, ±2 mins is pretty standard where as before waiting 10 minutes for everyone to find the correct physical room was pretty standard.