v6 vs v7 PDP-11 vs Vax much less vi vs emacs.

Amusingly, as weith many of us, I got my start with "ed." I never actually learned vi. By the time I was ready to move up to screen editors, the emacs-ish things were available to me.

I did a small stint using INed (Rand-editor variant) at one job.

My employees always found it amusing that if I was stuck on a machine that didn't have some emacs-ish thing, I just used ed. They marvelled at my ability to complex substitutions with the s/// regular expressions.