I suspect that a decent amount of people saw PHP 10 years ago, decided that PHP4 sucked (it did), and do not pay close attention to further PHP development ever since. Newer PHP is a much nicer language than it used to be. Newer frameworks can be reasonable and elegant.

OTOH RoR has its own bunch of problems, and exploits a number of anti-patterns "in the name of simplicity", and Ruby as an ecosystem has its own set of pain points (e.g. deployment).