But no, I don't generally have trouble with spelling mistakes.
I think one of the interesting things is that vi is really a mode-based editor.
Sometimes the easiest way to get something done is to be a little naive about it.
Document preparation systems will also require large screen displays.
You can't prove anything about a program written in C or FØRTRAN. It's really just Peek and Poke with some syntactic sugar.
You can drive a car by looking in the rear view mirror as long as nothing is ahead of you. Not enough software professionals are engaged in forward thinking.