Actually, the GP was talking about running on your own server. Ruby, Python, Java, PHP, they're all close enough in terms of setup time that it need not factor into the decision. Or you can run any of them on dotCloud, EC2, Rackspace, lots of places. Deployability just isn't a differentiator nowadays.
No, it isn't—but if you knew how to deploy any of that, you probably wouldn't consider PHP.
90% of people just run a web site on a hosting server. Granted it's getting less and less common with the advent of the centralized service-based web, but still, that's the source of success.
