I think the parent post also may be making an assumption that C++ code takes little more effort/time to write than python. My experience is that this couldn't be further from the truth. I recently did some DSP work, and prototyping it in python then rewriting the code in C++ easily saved me calendar time as well as effort and headache. Python code has a tendency to just work for numerical applications and it would have been a bigger headache to check my work in C++ without answers that were easier to verify in python (I remember reading years ago a thread on benchmarking that got shut down hard by someone pointing out that only the python code was giving the correct answers due to various floating point issues). On top of that, I needed to use templates to get more compile time substitution to squeeze out performance, and struggling with templates and the type checker would have been a context switching nightmare without having the algorithms already working.