I believe the true answer is: It's true and perhaps a little sad, but in the long run, not hugely important.
As long as there is a steady flow of high-quality questions, even if it's slowed, we're doing all right. And also very importantly, as long as the quality of the answers is good.
There is a piece of the Area 51 FAQ that is pertinent here:
To attract experts, you need a site where people are asking very interesting and challenging questions, not the basic questions found on every other Q&A site. Your goal is to make it clear that this is a professional site.
Remember, pro sites WILL attract the enthusiasts, but not the other way around!
Now that this site is well established (over half a million questions!) we have certainly attracted the enthusiasts, not only the professionals. (The excerpted text above is discussing what sort of questions your site must have to establish itself.)
The way to keep the site high-quality and keep it home for real professionals is, of course:
- Ask excellent questions
- Write excellent answers
- Vote on questions and answers you found helpful
- Vote on questions and answers you found unhelpful
- Vote to close/delete any off topic, duplicate, low quality, etc. posts
- Help new users learn to follow the guidelines of the community
In essence, just be a good, contributing member of the community, and help to forward the purposes and guidelines of the site. That way the community stays alive and flourishing, and we all win.