As an IBM hobbyist user, picture something worse than VMS in 'hackerdom'. IBM's mainframe OSes are like NT/OS2 taken to the total extreme with objects, because

As an IBM hobbyist user, picture something worse than VMS in 'hackerdom'. IBM's mainframe OSes are like NT/OS2 taken to the total extreme with objects, because by default you don't see files but objects which might have files... or not. Imagine the antithesis of Emacs. That's an IBM environment with 3270 terminals and obtuse commands to learn.