Should really have "using ITS" in the title - I would guess that most programmers actually used TOPS-10, I know I did.
ITS was the most programmer-friendly development system I ever used before the Lispm. It helped that the PDP-10's architecture is so user friendly: a simple, symmetrical reduced instruction set.
ITS is very convenient to use, and the lack of red tape is very refreshing. It's a welcome retreat from today's stack of complexity.
I considered that, but thought the distinction would be lost on 99% of the viewers.
I think I will do a similar video running WAITS which is basically the TOPS-10 style programming environment.
Nice! I guess, we need a legacy computing open university channel…