I'm not convinced that Fortran has any remaining advantages. Sure, a bunch of libraries (BLAS and LAPACK in particular) may be written in Fortran, but that doesn't mean you can't call them from C. Maybe there are some uncallable-from-C libraries out there that I don't know about, but I'm pretty sure the only reason physicists still use Fortran is that they have old legacy code (and/or old legacy collaborators).

I use Fortran every day, and I can't stand it. But it's quite common to find physicists, even young ones, who only know Fortran.