That was my first thought as well. I’ve had researchers running an in-house built Fortran program in the field of genetics on our HPC clusters, such that they’d run their task as 1000s of jobs in the cluster each operating on a small segment of data instead of a single program making use of as many cores available in the system. Perhaps, newer Fortran would’ve done it, but the old software was still reliant on old Fortran.