In the past, I would say that most people on the site were successful doers, either working on startups or in tech. The focus was almost exclusively tech, with very little politics. But over the last few years it really feels like the tone has shifted in the anti-business, especially anti-big-business, direction. There are also a lot more commenters who seem to feel disenfranchized in the current system. And there are a lot of folks who seem to have a pretty pessimistic outlook and are ready to believe and upvote stories that confirm it. Not sure if these things are related or if it's just different groups of folks who have happened to become attracted to the site around the same time.
That doesn't mean the site is going down the tube, but it definitely has a different character than back in the old days.