I think this site when it first gained its popularity was inhabited by a lot more professionals in the design, construction, and development worlds. We all used it as a site to tease others a little and find info on stuff going on in our professional world.
Then came a wave of general interest from the public and this place became over run by people (some of which thought they knew more than they did).
I can't speak for everyone but I'll say personally I used to love posting to this site on a daily basis. However, as its popularity grew, conversations became dominated by certain people. Frankly, I didn't care to hear their opinions and I stopped sharing what was going on in my world and I retreated. Now I'm only here once a week or two. I check in to see what's going on, but due to the volume decrease in posts over the last few years I'd suspect that others felt the same way I did.
My personal opinion.