Why "will start writing [...] meaningful [...] code"? They already did, right? Just two examples are Wordpress and Facebook. There are many impacts made by PHP

Why "will start writing [...] meaningful [...] code"? They already did, right? Just two examples are Wordpress and Facebook. There are many impacts made by PHP tools. (Btw I'm one of the guys switching from PHP to Python, so this is not advertisment from a fan)