Steve Lionel, retired from Intel compilers group, recently noted that the upcoming Fortran release is being called Fortran 2018 instead of Fortran 2015. Some scientists and engineers remember Fortran 77, and would benefit from exposure to the immense improvements brought with Fortran 90 and later revisions. Fortran 77 syntax is very constricting, from five decades ago. There are Fortran 77 diehards, even graduate students still writing new programs in Fortran 77.