HN readers are 1-2-5 years ahead what happens in the market. you can tell a lot of things that are coming down the pipe if you pay attention on HN. Once the "nerds" give up on reddit it will be an uphill battle to keep the site viable.
Recently I've been moving to Facebook Groups. Compared to Reddit the groups are much more niche, which is a good thing.
On Reddit there is a general sub about a hobby I'm interested in with 198k subscribers, on Facebook I've found groups with the specific niches of that I'm interested in with 16k - 30k subscribers. The questions are much more specific, and the people there are a lot more knowledgeable. The people on there seem friendlier too.