I know I fell into it because I originally learnt UNIX on shitty XENIX servers which were basically AT&T SVR4 on x86. The internet and Linux weren't around then

I know I fell into it because I originally learnt UNIX on shitty XENIX servers which were basically AT&T SVR4 on x86. The internet and Linux weren't around then. Later on I had to work with a number of different versions of different UNIX platforms on a daily basis (Tru64, Solaris, HP-UX, AIX) as well as multiple varieties of Linux, and vi was a common denominator on all of them.