I was looking at the different Stack Exchange sites and noticed that there is a Drupal.SE which is cool, but then I was looking on Area 51 and noticed that a proposal for a Ruby on Rails site was closed as an exact duplicate of Stack Overflow.
Hence my question, why do the people at Drupal (I admit, it is a bad platform so they do have lots of questions) get their own centralized QA area while the Ruby on Rails developers don't?
So lots of debate, and Pekka has even been so kind as to draw a picture. I would like to point out that there are not just a few dozen questions that should be closed as off-topic on Stack Overflow about Ruby on Rails, but there are literally thousands and thousands of them (I know, I'm a full time Ruby on Rails developer.) See this question asked by me right here for a perfect example that can lead you to hundreds of others.
So @RobertHarvy, you have a point, but only to a certain extent. At some point the existence of all of those questions does in fact become evidence...
(As a note, I'm joking about Drupal, though only kind of, sort of...)