I did not use AI to write this. I paid professional editors to help me get it polished. There were 4 rounds with 5 different people. I also got lots of grammar/typo comments using helpthisbook (hundreds of readers pointing out errors).

I did (very rarely) take single sentences to ChatGPT and ask it for the correct way to punctuate it.

I personally have always used em-dashes, perhaps incorrectly. I actually tried to learn the correct usage and stick to using it when appropriate. One of my goals in writing this book was to become a better writer, which I could only do (IMO) by writing and getting editors to help me.