But that's just the surface reason. The deeper reason is because of HN's design which seems to weight flags much more heavily than up votes. This means that a non-trivial minority can successfully drag a story off the homepage, even if a majority believes it is important and worthy of discussion, and even if the comments are actually constructive.
Unfortunately we are not able to see what the count of flags are, and I don't know the scoring algorithm to see what portion of minority is needed to make a story disappear, or if it is even greater than a fixed portion (i.e. whether flag count may have a greater than linear effect, compared to linear support from up votes).
I have heard the rationale of attempting to avoid flame wars and heated discussion of controversial topics, but I'm not sure that it's the only way or worth the price of making things important to most of the community disappear. So far, follow up submissions seem to still be on the home page, but as I write this comment, I can see https://news.ycombinator.com/item?id=27396783 already drop from the top position down to #6 and I wonder if it will disappear also.
I hope that HN may reconsider what options are available to keep discussion constructive and useful while still allowing important topics to be seen and discussed without being buried by a minority.
Edit - 2 additional notes a few minutes later:
- https://news.ycombinator.com/item?id=27396783 has now dropped more than halfway off the front page.
- Whoever downvoted this comment, please consider responding as well.