As a publisher you would prefer to work with people who don't make their own engines. As a developer you are kind of wary of the guy who wants to write his own

As a publisher you would prefer to work with people who don't make their own engines. As a developer you are kind of wary of the guy who wants to write his own renderer. That person is going to be bored scripting. Plus, twenty five years ago a game developer could afford to hire the person with the chops to right a renderer. We used to be able to get people from Cal Tech rolling off aerospace companies after the cold war. Now people with those skills are way too expensive to hire.