"People need to be careful when they're too obsessed with the design of something. You see this a lot — products with really beautiful, fluid, smooth demos. People don't have a void due to a lack of beautiful, fluid, smooth things. They have a void because they have a problem. Good design can help them get there, but design is not what they want. Don't obsess over design without purpose. Designing for the sake of making things cool — you won't turn that into a sustainable business. Be careful with that."