"modern" stuff such as free format and identifiers up to 31 chars have been available ever since F90[0] (all the while being compatible with F77 code) released

"modern" stuff such as free format and identifiers up to 31 chars have been available ever since F90[0] (all the while being compatible with F77 code) released in 1991. AFAICT people stuck with writing (and complaining about) F77-like code because habits. [0]: https://en.wikipedia.org/wiki/Fortran#Fortran_90 https://en.wikipedia.org/wiki/Fortran#Fortran_90