Well, Facebook and Wikipedia are using HHVM to execute their PHP code, so at least those two are not really satisfied with PHP. I bet they'd like to rewrite the

Well, Facebook and Wikipedia are using HHVM to execute their PHP code, so at least those two are not really satisfied with PHP. I bet they'd like to rewrite their code in a faster, more memory-efficient, language but are hindered by the complexity of their code base.