"1. Full revision history. Every keystroke I've made, every tiny little edit should be saved. Everything. In order. Everything. This is a small data problem."

"1. Full revision history. Every keystroke I've made, every tiny little edit should be saved. Everything. In order. Everything. This is a small data problem." A 'replay' function would be good as well. I have a feeling that what I actually do when editing is different to what I like to think I do. This feeling is based on some screen videos I did a little time back.