Personally, I think something like mastodon is better for this purpose. You can post your HN related stuff hashtagged #hackernews and others might follow. That being said - IMHO if you want a social network or community, don’t call it a “communal product”. Products are for making money and whatnot.
Should social media be a profit-driven enterprise as a civilization-scale product?
I mean this question is way too big for this sort of thread. I would say that simply calling it a “product” already reveals a certain ideological bias to begin with.
It’s like the difference between a city square and a shopping mall as a place for a society or community.
What is unique about this place is that many people here are more than qualified to build pretty much anything. So, it would be safe to assume that if we wanted something different, we would probably just build it.