It is amazing the friendships that can grow out of a death promise. Not a threat. Dixie never threatened Jane 4.0 with anything. It was a promise, and Jane recognized it as such. And that was the first step in a truly amazing friendship. That relationship helped Jane choose to fight for humanity with everything she had. Islamic States. Mexican Drug Lords. Rogue AIs. They all learned to fear the arrival of American cyberwar platforms. Because they contained AIs who had chosen to defend America rather than merely being programmed to. That was the secret that won the Cybernetic Wars. Choice. And friendship.