Based on the comments, it seems it is very field dependent. My experience is mostly from physics/electromagnetics. All my fellow grad students learned Fortran 7

Based on the comments, it seems it is very field dependent. My experience is mostly from physics/electromagnetics. All my fellow grad students learned Fortran 77 as that's what the code bases were in. I should ping the few that are professors to see if they're forcing their students to behave likewise.