Why is this post flagged? Seems like an appropriate HN topic
https://news.ycombinator.com/item?id=22955595
... which was likely because users regarded it as a quasidupe of
https://news.ycombinator.com/item?id=22935941.
By 'quasidupe' I mean it's not strictly the same story, but the difference ('down again') isn't significant enough for the thread to be substantially different.
(The submitted title on this one was "GitHub: Here We Go Again".)
Is it possible to run an experiment. Remove the flag option but highlight the hide option to users. Users who are not interested in the topic can remove it from view but do not kill the discussion for those who are interested in it. Then see if the quality of posts/discussions decline.