That's true, I keep forgetting about https://lfortran.org/ Unfortunately in my experience the people I know who almost exclusively code in fortran are not really interested in jupyter notebooks.
Indeed, I expect it will be newcomers to Fortran from languages like Python, Julia or Matlab who will really like LFortran once it matures. We are working very hard on it and are close to compiling real world projects, you can follow our progress on MVP here:
Current Fortran programmers might not always appreciate the interactive part, but I think they will also like LFortran as another independent compiler and for some of its features once it matures (such as C++ translation, fast compilation, good warnings, automatic wrappers to/from Python, etc.).
https://gitlab.com/lfortran/lfortran/-/issues/313
Current Fortran programmers might not always appreciate the interactive part, but I think they will also like LFortran as another independent compiler and for some of its features once it matures (such as C++ translation, fast compilation, good warnings, automatic wrappers to/from Python, etc.).