And if he now rewrote the code in Scala using even better domain knowledge and it ran in 0.1 seconds, would this be proof to you that C++ isn't relevant after a

And if he now rewrote the code in Scala using even better domain knowledge and it ran in 0.1 seconds, would this be proof to you that C++ isn't relevant after all? The point of my comment is that your basis is flawed. The apples to chimpanzees reasoning you are using is not valid.