There's a couple of Browser extensions that have sorta tried to accomplish this before. Epiverse[1] seems to be the most polished one so far. It originally intended to allow any user to comment on any webpage. But it found that without existing content, few found it useful. So eventually the creator just parsed to see if the webpage was posted on Reddit or Hackernews. The original purpose of it ended up being too expensive to host so it ended up just becoming a HN/Reddit parser. Which, tbh, is basically what I want to build at this point. I'd love to contribute to the project, but I don't have much time and it's closed source
The other similar extensions also just parse HN/Reddit like Newsit[2] (which is open-source) and Thredd[3] (which only parses Reddit). My only real addition to this is that I'd like to include the ability to parse more than just Reddit and HN. I wanna create a discussion aggregator. There's similar sites like Lobste.rs and Lemmy.ml that could also be parsed, but obviously that's not the full extent of where discussions happen around a webpage.
I don't think I have it figured out, and I don't know if anyone ever will, but I think there's a lot to gain if someone is able to someday harness that feeling that you get when you read something really good or find something really cool and wanna see how others responded