As a relatively new person here, I think the response about duplicates up above is a good one. Just to add to that, I feel like there are times where a question has maybe one answer, and it's not at all comprehensive or directly relevant to the new question being asked, but close enough where some would automatically close it.
I know this is basically asking for more lax standards in closing a duplicate, but I really do feel like there are sometimes pretty unsatisfactorily answered questions from a few years ago and it would be nice to seek a fresh and more relevant (and hopefully comprehensive) response.
Last point (and unrelated to the first)... I was directed to SE by a few colleagues, and they warned that it's mostly for STEM/comp people, and if you're humanities, social science, etc. you won't get much out of it. I guess I don't have an explicit suggestion here, but that feeling has certainly rung true for me so far.
Edited to add: I don't intend this at all to be snarky, but one relatively simple fix would be to figure out how to incentivize more people to answer more questions. I was searching through the first few pages of recent questions just a moment ago, and most questions had 0, 1, or 2 answers. If someone asks a question for the first time and gets 1 answer, they may not think it worth it to return and engage further.