1. Joel saying "I didn't understand that question" and then moving on might have been succinct and practical, but it was just not a good reflection of him.
2. He acts like R1C1 mode is the only way handle relative references for the first 13 minutes. One of the first things I learned in Excel was $ to pin a reference to row or column in what he calls "baby mode". I think it's not babyish to use $ which is more succinct; you can edit the formula and see the calculated value right away. It seemed like he waited a long time to talk about that.
3. "Almost none of which you can do in Google spreadsheets" at 18:15. Sounds so pro-Microsoft, right? Yet, if you look, he's obviously using OS X, which is surprising to me, because MS Office has historically sucked on OS X compared to its Windows counterpart, and it's been incomplete: https://9to5mac.com/2016/01/21/windows-mac-ipad-microsoft-of... even though, yes, it's a lot better than it used to be. Also, Google docs is free.