This book is really meant for people who want to be senior managers in a company that is growing like crazy, and want to take on the people and organizational challenges that result.
Also the book is very explicitly centered around the "SF way" of building companies, and I wonder how much of this advice would apply to, say, a Chinese unicorn. (I think, not very much. e.g: 'diversity' as key focus area for the CEO seems to be a very SF centric (or at least US centric) way of doing things, and reflective of social and political phenomena in the USA. I doubt Chinese or Korean CEOs spend as much time on 'identity politics' flavored 'diversity hiring' as a CEO would in SF)
So if you are scaling up a post product/market fit company in SF/the USA, and are in a senior management position in that company, this book is likely to be of great help.
Even otherwise it is a good roadmap to how you can "live long enough to see yourself become the villain" ;-).
The book has a different focus from many "startup" books and that is refreshing. Overall I liked it, modulo the 'platitude problem' I mentioned above.
I really liked the interview with Patrick Collison, who seems to have his head screwed on right.