“When you start out, it’s a one-person thing . . . you’re not only figuring out what to do but actually doing it . . . The company gets bigger, and . . . you’re mostly figuring out what to do but not how it’s done. Eventually you get to the point where you’re mostly figuring out who is going to do it, not even what to do. So one way to think about this is as a transition of questions, from “how?” to “what?” to “who?” As things get bigger, I don’t think you can operate any other way.”