The most important business and product management book of the past fifty years. If you’re a technology PM and you haven’t read Christensen, do so right now.

“It’s fantastic,” Gurley said. “It’s really the core essence of why start-ups have an advantage. Products that are able to be disruptive get over-designed. They get feature-rich, they get complex, they get heavy.

He added that “if you can design a product that exploits a desire of a subset of the customer base that doesn’t want that complexity, but wants this feature, you can bust in. I’ve seen that over, and over, and over.”