Andrew Romano sets out to debunk Malcolm Gladwell’s argument in Outliers that the Beatles made their success through the “10,000-hour rule”—in this case, spending thousands of hours of playing in Hamburg:

But this isn’t even the real problem with Gladwell’s theory. The real problem is that while the Beatles’ marathon stints in Hamburg did transform them as a band—they were so vibrant, so tight, and so unrecognizable when they returned from their first campaign that the crowds in Liverpool mistook them for a blistering new German combo—the “complex task” they had now “mastered” was not the same task that would eventually earn them world domination.

Being able to mach schau in a small club was a pivotal part of the Beatles development: it won them a fanatical following in Liverpool, which in turn drove their debut single “Love Me Do” up the charts even when the suits in London refused to promote it, and it was also the reason the Fabs were able record an LP as a thrilling as Please Please Me in a single ten-hour workday. But beyond that, Gladwell is wrong. The Beatles’ “excellence at performing” is not “what it took” for them to become the greatest rock band of all time. In fact, the Beatles were stuck in a rut even after they returned from Hamburg in 1961—and their live expertise was not enough to get them out of it.