I think multiple levels of undo would be wonderful, too.
Well, limbo is not a good place to be.
I think one of the interesting things is that vi is really a mode-based editor.
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.
We can't simply do our science and not worry about the ethical issues.
Most of the bright people don't work for you - no matter who you are.