I had a review audit on [this question](https://stackoverflow.com/questions/26605431/why-is-super-compilation-not-implemented-more-prevalent), and I said it should be closed because it is primarily opinion-based. The system said that I failed the audit because the question is actually high quality.

How can a question that basically says "why don't people implement x" *not* be opinion-based? How is there some real answer for that kind of question?

Further supporting my claim is that the accepted answer starts with "My understanding is", and then builds the entire answer on that conjecture. Whether the conjecture may or may not be true is besides the point - the fact that the best answer *isn't sure* is a pretty good indication to me that this is opinion-based.

So why is this a high-quality question?