I love the last chapter of "No one teaches the end so lets put concurrency here" -- is so true. I feel like I've almost never done the last chapter of any text

I love the last chapter of "No one teaches the end so lets put concurrency here" -- is so true. I feel like I've almost never done the last chapter of any textbook I studied in school. And it does seem like concurrency shows up in a lot of comp sci textbooks at the very end.