I started a new thread specifically about the AP's sensing of hands on the wheel since there's starting to be some FUD thrown. Before this devolves into a total flame war, I decided to do some actual testing and now I think I know what's happening. My experiment was to drive on a 3 lane highway on AP and see if and when the Hands on Wheel alert came up. To start with, as I've seen with this update before, the only time I got the warning was when the road markings deteriorated too much. However, some people with updated Teslas have reported the warning appearing every 3-5 minutes, so it seemed worth pursuing some more. I always drive in AP with one hand lightly gripping the wheel so I can feel its motion and to be ready to take over if it does something crazy. This time though I tried completely hands off driving. That started the warnings at just about exactly 5 minute intervals. My conclusion is that, in addition to cases where the car isn't sure what's going on, if the car can't sense you holding the wheel for 5 minutes it emits the warning. Some people may be getting the warning if they are letting the wheel slide in their hand, but I find that uncomfortable. It seems like holding it tightly enough that you can feel the wheel moving and it moves your hand and wrist is enough. I wasn't even aware it was an issue till I started playing with it. It is my very strong opinion that using AP without a hand on the wheel, in addition to being plain misuse, is dangerous to the occupants of the car and surrounding traffic. I understand that there is also a new check that prohibits AP if no one is in the driver's seat as well, and I'd put this check in the same category. I guess if it's important to you to be able to drive without holding the wheel at all, or for that matter, being in the driver's seat, then this update may disappoint you.