A good way to summarize it is: Gladwell implied that if you did 10k hours, you'd become world class, that's it! Ericsson identified that the most significant di

A good way to summarize it is: Gladwell implied that if you did 10k hours, you'd become world class, that's it! Ericsson identified that the most significant differentiator between the top performers at conservatories and the rest was how much of their lives they had spent doing rigorous practice. Those are two totally different things. To paraphrase Ericsson in a way that is meaningful for most people, he basically said "10k hours is the average we saw of our top performers" (10+ years, 3 hours a day). He in no way implies that doing that would make you world class, or that all world class performers had done it. He never says it's either necessary or sufficient - just what they observed their top subjects had done relative to their bottom ones, so if you want to get good, start there. There are people out there who are world class after playing half that, and scads and scads who aren't and have done more than double. I took a lot longer than 10 years to do my 10k+ hours, but by now at age 47 I've done them. So have most of my musician friends. We gig around town. lol. 10k is table stakes.