The Secret to Satya Nadella’s Success is a Fish-Shaped Curve

Microsoft’s turnaround came only after some hard but crucial decisions by the CEO

Photo: Brad Barket/Getty Images

SSatya Nadella was recently named Fortune’s Businessperson of the Year. It’s well-deserved. I’m old enough to remember Microsoft as being sort of like the Star Wars franchise: It started off great, then had a really rough middle…