I write shaders as a hobbyist game developer (I'm not in the gaming/graphics industry). I appreciated the submission. Shader code is often counterintuitive, I

I write shaders as a hobbyist game developer (I'm not in the gaming/graphics industry). I appreciated the submission. Shader code is often counterintuitive, I tend to think like a mathematician and not an optimizer when I read code examples, and I always wonder why the code is written in the way it is. This paper makes it clearer! One question: On slide 13, the author outlines some of the limitations on the compiler. In the ~4 years since the paper was published, have compilers gotten better at solving some of these problems? or are these instead fundamental problems that will more or less always be present?