The Beatles performed live in Hamburg
over 1,200 times from 1960 to 1964, amassing more than 10,000 hours of playing time, therefore meeting the 10,000-Hour Rule.
Gates met the 10,000-Hour Rule when he gained access to a high school computer in 1968 at the age of 13, and spent 10,000 hours programming on it. In Outliers
, Gladwell interviews Gates, who says that unique access to a computer at a time when they were not commonplace helped him succeed. Without that access, Gladwell states that Gates would still be "a highly intelligent, driven, charming person and a successful professional", but that he might not be worth US $50 billion.