The question is: what language should I use for HPC.<p>An answer is Python.<p>If you use C for HPC (the way you mean it) it will be slow as a dog. Because HPC is done with BLAS, LAPACK, etc. If you do HPC in C you are calling into BLAS and LAPACK. They are Fortran libraries. Anything else is dog slow in comparison (a slight stretch, but not by much).<p>So, the &quot;real&quot; answer is Fortran. But not a lot of people are sitting at their desk writing Fortran for scientific computing these days. They are writing Python, C, or C++ for the most part. All of which use libraries that call into the Fortran libraries.<p>That&#x27;s all this article is saying, and we all understand it. No one is wringing their hands about what language the libraries are written in unless you are trying to write one of those libraries.<p>Working professionals use Python for scientific software because it excels at data munging, making reports, and very high speed computation. Everyone gets that you need to add some libraries beyond the libraries provided from the base install.