Let's consider what purpose is chess.SE fulfilling as compared to the other major sites.
- It does not carry the latest news and happenings.
- It does not relay live games of major events.
- It does not track the live ratings.
- It does not provide lookup of games, openings and other relevant statistical data.
- It does not sell chess products.
- It does not encourage banter.
For what that is remaining, it might be good for questions that pertaining to specific openings and endgames, but I tend to see it as limiting to fit the type of content that may exist in chesspub and other opening/engine sites into the boundaries of SE, and do not believe expert users on those sites would find it attractive.
Also, the Q&A format reminds me of the
Evans on Chess column in Chess Life (US chess magazine) and the content is entertaining primarily for the amount of anecdotes available to the late writer, who had been part of the scene for many decades. I would seriously doubt it would be successfully had the content been limited to "objective content" with Informator-styled symbols.
This is my initial response about the feasibility of chess.SE, and it does look like the users have already given the answer, so the problem now is accepting the reality.
The main problem is that it has no real niche except for "free" training tips and trivia (you can consider that either as a specialty or degeneration). The problem about training is that:
1) Professional trainers are either too busy or understandably reluctant to participate since the profession pays rather poorly.
2) To become experts (in the sense of playing strength), you would literally have to put in hours of work to play, study and calculate, and that has very little to do with going through Q&As.
The format is also not helping because existing chess sites provide more relevant content and function and do not limit themselves to merely Q&As of a certain nature. Having a site like this only looks like an attempt to fit an existing solution onto a non-existing problem instead of solving any real one.