I think editors have to come out of a certain kind of community.
Most of the bright people don't work for you - no matter who you are.
Take responsibility for the things you build and invent.
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.
I think multiple levels of undo would be wonderful, too.
The reason I use ed is that I don't want to lose what's on the screen.