I agree. Of course there is no 'single factor' for almost anything. So, going with the themes of attention seeking hyperbole, I would say the 'single biggest f

I agree. Of course there is no 'single factor' for almost anything. So, going with the themes of attention seeking hyperbole, I would say the 'single biggest factor', is the ability to find and keep skilled developers in any of these top 10 frameworks. The differences mean nothing when the bigger picture is considered.