> Again, nobody wants to -and more than that nobody can- prevent any compiler from supporting a `bfloat16` real. I can’t imagine that the decision from a compiler editor to bring `bfloat16` support depend in any way on the presence of a constant in `iso_fortran_env` (before `iso_fortran_env` did exist, many compilers were supporting 128bits reals).<p>Fair enough. However, if we only rely on vendor extensions for important features of the languages, then what is the point of having a standard in the first place?