I couldn't run a tight schedule, and if you're any good at teaching, you get sucked dry because you like your students and you're trying to help them, but you don't have any time left to write yourself.
I don't want anything to do with anything mechanical between me and the paper, including a typewriter, and I don't even want a fountain pen between me and the paper.
I wish I had a talent for dropping things as well as taking on new ones. It gets to be quite a clutter after a while.