I'll never forget the first time I used a word processor. An English teacher in college insisted we use these new-fangled machines to write one of our papers. I was reluctant and irritated. But, I did it.LOL. Some parts I have cut entirely-- you have no idea how much time I have wasted with ideas/theories which have been discarded. I have tossed whole chapters. Then there are digressions (you already know that I am an expert derailler) and my own flow of thoughts-- I end up moving paragraphs with regularity. On review, I think "why did I miss that?", add a paragraph or comment, and then discover that I already covered that a page later. Nonfiction has its own problems.
OMG! What a difference! It's not just the savings in trouble of having to rewrite the revisions. What amazed me was how much it helped with the thinking process! To have things instantly changed instead of dealing with lines scratched out and arrows to indicate the new desired arrangement.
He definitely made his point. I was sold!