I'm probably about 2 years out of being bleeding edge, but php-fpm&nginx are far from defacto standard. At least when you look at how the web is being served at large, looking at cPanel/WHM.
I don't believe cPanel/WHM even supports nginx yet as a standard option.
Not to be disrespectful - I know that cPanel and similar have their place - but no real business that expects to have a presence is using cPanel or any other "easy setup".
I don't believe cPanel/WHM even supports nginx yet as a standard option.