It's been 18 months since Tesla started building autopilot hardware into cars. I'm thinking about what to get next - I need another Tesla. My dilemma is a new Model S vs an October 2014 with miles on it - either one will be kept only a couple years until Gen 2 of autopilot hardware is released. But I'm speculating that 2016 cars may have improved sensor hardware in some way we don't know about which makes the data they feed to the brain more reliable (and thus perhaps less likely to make the car make a mistake on the road) - this is pure speculation on my part - no evidence to back it up. What do you think? Is there much of a chance that the sonar or radar hardware is more accurate/reliable in any way since the October 2014 cars? Maybe Tesla has learned techniques for better placement of the sensors in the 18 months they've been building? Any chance the camera has a more sensitive sensor which can feed higher quality data to the brain in difficult conditions such as glare or poorly marked lanes?