I can tell you why Java is worse from hosting providers point of view: php is stateless by default, you can easily monitor resources used by php, while java ser

I can tell you why Java is worse from hosting providers point of view: php is stateless by default, you can easily monitor resources used by php, while java servlets are stateful, they can use up a lot of resources and there are no easy to use available tools for hosting providers to monitor those resources Java can use. Java is designed to create applications to be deployed on multiple servers, not on a single server shared between a lot of users.