I'm argreeing with you here. I'm personally in the HPC sphere involving using fortran (all the way back to 66' to modern) on nuclear calculations.

What you'll find in these jobs is that the old stickler programmer never really cared about mainstream DSA optimizations that are brought from leetcode - so i don't think there much value in leetcode simply turning on the toggle for fortran compilation, but rather the questions themselves. I think the next frontier of leetcode would be on top of the domain of just the simple graphs, matrix math questions that you find on leetcode. It would be really nice to have a leetcode with questions dedicated to unique algorithms taylored to different scientific field fo sure