> It's not like programming in x86_64 assembly suddenly opens a world of possibilities because its "truly low-level" It certainly opens a world of possibilitie

> It's not like programming in x86_64 assembly suddenly opens a world of possibilities because its "truly low-level" It certainly opens a world of possibilities regarding the vector units. That's one place where inner loops hand-written in assembly still have an edge. On the other hand, with contemporary CPUs, high quality assembly coding is a highly specialized job skill by itself, so for general purpose engineers, learning it is most likely to yield a bad cost/benefit.