I have the update on my 2018 S with 2.5 hardware. No "auto stop" mode. What confuses me is "why?". I certainly understand that the difference in the motors allows regen down to zero but it's explained as "auto braking" which the vehicle is certainly capable of doing so (as it does in autopilot) . Why can't that feature be implemented to get one pedal driving. Of all the things they've added, that just doesn't seem too tough since it already does it in autopilot. IMHO.