How Tony Fadell left Apple and created the Nest smart thermostat

The founding story of Nest is described as a near-perfect tech myth: Tony Fadell, who helped create the iPhone at Apple, left the industry only to be drawn back by a personal experience that inspired him to build a smart thermostat. The article frames Nest's origin as the story of a legendary product maker finding a new mission after one of the biggest product successes in history.