I'm looking for a set of binoculars? Check the discussion on Reddit. Looking for some info in flashing Tasmota? Check the discussions on Reddit. Need some info on debugging my 3D printer? Same.
I've resorted to appending 'Reddit' to my Google searches whenever I'm looking for experiences people have with products or services, because it's a pretty sure bet for getting useful answers. It's also well indexed by search engines as opposed to Facebook groups and it has a much lower barrier for asking questions than Stack.
The only reason all of this content is there, is the network effect of those loose communities all being attached to the same domain and having a single account to interact with all of them. And of course, not having to search all over to find the best community / private forum for whatever thing you're interested in. As a man of many hobbies, Reddit is great and I really hate that Discord is starting to become the alternative, because searchability is crap and discussions are impossible to follow.