> I fear that part of the problem is that stories get posted, have good discussions, and fall off the front page before many readers see them.

That's it, and I share your fear. I don't know how to solve it. Maybe it's what the majority wants on the top, maybe it's what a vocal minority with high karma points doesn't want (flagging/whatever negative news). I just see the end result. I would just like to get the big picture on the frontpage and not have to rely on algolia search for that.

One thing I realized is that HN front page has very different topics depending on which time I check HN. It shifts its focus depending when people tend to visit HN from east cost, west cost, europe, asia. A useful function would be to check out the HN frontpage how it looked at a specific time. Let's say I would like to see HN as it looked like 8am Pacific timezone yesterday. I know about https://news.ycombinator.com/lists , maybe add another filter to that list.