Actually one of the main takeways from the book is that efficacy (elimination of non-critical tasks) is more important than efficiency (optimizing a task). I ha

Actually one of the main takeways from the book is that efficacy (elimination of non-critical tasks) is more important than efficiency (optimizing a task). I have been doing this since reading the book, and helped my life tremendously (also went into early retirement). When Elon Musk was interviewed at SpaceX about Starship, he said the same thing actually: they are launching non-optimized vehicles and iterating by simplifying the design. Also Tesla almost went bankrupt through the Model 3 ramp up phase because he was trying to make manufacturing more efficient instead of simplifying it. Or in Knuth’s words: early optimization is the root of all evil.