But rendering isn't what makes a modern computer slow. For example, Assassin's creed isn't even that well optimized but it maxes all threads, uses all the GPU a

But rendering isn't what makes a modern computer slow. For example, Assassin's creed isn't even that well optimized but it maxes all threads, uses all the GPU and looks beautiful. And people have tried "simple" hardware (it ends up being not simple) that the programmer (compiler) understands before, it doesn't work.