Two additions to the many comments saying the 10k rule is bullsh*t: 1. To quote one of my favourite coaches: "Practice doesn't make you perfect. _Perfect pract

Two additions to the many comments saying the 10k rule is bullsh*t: 1. To quote one of my favourite coaches: "Practice doesn't make you perfect. _Perfect practice_ makes you perfect." 2. It can save you enormous amounts of time if you find the right teacher and teaching resources (eg. books, courses, etc.). But how do you know which ones are the right ones - for you? Also, note that you can certainly reach a fairly high level in almost anything you want, but it is much harder to improve on that. Unless you have talent or you started learning the thing in your childhood, there is definitely a glass ceiling, and it may be lower than you think. But then again it may as well be higher, and you don't know which until you try it. But then, of course, it is too late :)