What do you mean? It’s a paper written by several people on the standard committee of who contributed to the draft standard, on which blog would they put it?
Traditionally, these things were published in ACM SIGPLAN Fortran Forum (or on NAG’s servers for historical reasons). Arxiv is really natural, given the direction scientific and technical publishing is taking. This is a heavy duty language used by scientists and people like mechanical and nuclear engineers. Not the latest JavaScript framework or full stack doodad from Google.
Yeah, I didn't mean it pejoratively, just that it's an indicator that the Fortran community is a very different scene from what you might find around other programming languages that are typically discussed here.