As for which version is used in the wild, it's the same as with many other languages that have stuck around for a long time. Plenty of legacy code which might still be F77, but practically all new projects, or extensive modernization of legacy code, will make use of the modern features.
I suspect Fortran's reputation is largely due to many of the foundational libraries of numerical computing like BLAS and LAPACK, are F77 (LAPACK uses a small number of 'modern' features, but largely it's still a F77 codebase). This is the kind of Fortran that non-Fortran programmers might come into contact with. But the Fortran that Fortran programmers write today is definitely much more modern.
-But we can build with concrete and steel and plastics and all sorts now.
-Most people use bricks though. And people are not tearing their brick houses down to rebuild them in steel. See? Building is old fashioned, antiquated!
In fact, nobody now starts a new project in F77. There’s a lot of F77 brick code around, yes. And it still does the job it was asked to do even though it gets moved to a new district every ten years.
! MARK 1 RELEASE. NAG COPYRIGHT 1971.
It has been revised since then to use free form, structured programming, MODULEs, KINDs, INTENTs and IMPLICIT NONE.
If we can do it, everybody can. I have already mentioned some reasons that people don't do it. None of the reasons I have heard are "Fortran is too old and clunky".