Well for myself it broke things down clearly in terms of the framework to operate in (zero to one, one to infinity) and what types of products you should even strive to build. I recall not seeing a lot of the ideas put so down so clearly and cleanly before, and as far as I know a lot of the book's framing became conventional wisdom in this industry after publication, or after many took his course at Stanford. So maybe it's nothing new to you because the lessons have been internalized already.