Gun shy after Fire Phone, and held to Jeff Bezos' almost impossibly high standards, Amazon's hardware developers had long road to hoe with the company's latest proprietary hit.
"When Amazon executive Dave Limp first saw the pitch for the product that would become Echo in 2011, his main reaction was doubt. 'This is going to be hard," Limp recalls thinking. "It foretold a magical experience. But it would require a lot of inventions.'"