It's easy, fast (both Development speed and Page Views), and can deploy anywhere with a few clicks? It has no novel concepts that require learning something new

It's easy, fast (both Development speed and Page Views), and can deploy anywhere with a few clicks? It has no novel concepts that require learning something new. It has a plethora of existing code, documentation, frameworks, and StackOverflow answers to solve almost any problem (albeit, not always correctly). Its the lowest barrier to entry web language - and honestly, I'm ok with people writing shit PHP. It gets good Ideas out there quickly - allowing the business to grow without a focus on the Development. This creates opportunities for sharp developers to come in and work on proven ideas.