To me (and it seems very much a personal opinion) not having an F-key array on the left - as on the original AT keyboards - was one of the biggest losses made

To me (and it seems very much a personal opinion) not having an F-key array on the left - as on the original AT keyboards - was one of the biggest losses made during keyboard evolution. Depends on the software in use of course, but being able to hit a modifier (Ctrl, Shift, Alt) and an F-key without stretching is the reason I still use the old-style layout to this day.