I'm not disputing that there is seriously heavy math involved - many of my fellow PhDs in physics/engineering went to finance. It's just not what people consid

I'm not disputing that there is seriously heavy math involved - many of my fellow PhDs in physics/engineering went to finance. It's just not what people consider as "science" :-) My point is that branch of HPC developed somewhat independently of most of other science disciplines. It's also relatively newer, so it doesn't rely heavily on legacy code from the 70's/80's. Generally, newer disciplines (computational biology, modern ML, etc) don't use Fortran. Older stuff (physics, electromagnetics, most engineering, etc) are full of Fortran, and continue to be.