Maybe debating about it is not the right approach. If you have experience in PHP and you can afford some (inherent) delays in the next project you should try Py

Maybe debating about it is not the right approach. If you have experience in PHP and you can afford some (inherent) delays in the next project you should try Python and see for yourself. You will be hit by reality faster and better than any debating would. Then you'll have an educated opinion for the next (second) project. I'm biased towards Python.