That is a very depressing interview. I find it difficult to feel sorry for him since he mentions declining a job offer from John Carmack.

I get the impression the guy has been called a genius so often he feels insecure about not living up to the name.

Awesome and depressive. He set his engine as something he will never top and believes it, and that is only thing keeping him to make something amazing. Some people got over self imposed limits and are blasting. Some are fine where they are.

Still I am thankful to the world for him to exist.