Yes, to be more clear about my point: there is a lot of learning about MIX to set the groundwork for future stuff, which can feel arbitrary and disconnected from practice. It can be off putting to a new reader. It took longer to read than just about any other part of the book, since the rest of the book has a much higher density of interesting material. Also it’s the only section that is really “required reading” and I most enjoy this book by bouncing around. I just want to encourage new readers to stick with it, it’s not exactly representative of the whole book.