There was no law of physics—no basic principle—that prevented all of the functionality from being on one device. When the engineers tried to explain the need for the router, Musk’s face turned stony. “Delete,” he said. “Delete, delete, delete.” After they left the meeting, the engineers went through the usual stages of post-Musk distress disorder: baffled, then angry, then anxious. But within a week they got to the stage of being intrigued, because the new approach, they realized, might actually work.
