The op makes an extremely valid point: php works for his company. Clearly they're more concerned about the end result than the means through which it's accomplished. And isn't that the way it should be?

We're not talking about a freelance web developer here, who can easily experiment with different languages for each new project. It's a company with a large existing code base, which needs to function properly and, as it happens, so it does. Why throw all that in the bin just to be cool?

Remember, the op does say they experiment with other languages at the company. They have yet to find one whose advantages are amazing enough to be worth a complete rewrite of the company's code base. That's not unresonable. So why all the "they're just can't be bothered to change" comments?