> In Tesla's particular case, the opt-in UX was even worse, because its automatic emergency braking wouldn't engage if autopilot was off [3] -- a decision contr

> In Tesla's particular case, the opt-in UX was even worse, because its automatic emergency braking wouldn't engage if autopilot was off [3] -- a decision contrary to sane user expectation, and completely unlike cars of other premium automakers. And the fact that their emergency braking still can't detect all stationary hazards in a travel lane is tragic. AEB is very much running when autopilot is off, I occasionally trigger the warning when going down the parking garage(car thinks I'm heading head-on into another car). Also after driving rush hour from Oly->Tacoma->Seattle for the last 3 years you can pry Adaptive Cruise control from my cold, dead hands. 75k mi and not a single hiccup or false positive. The mental overhead of having to constantly evaluate vs intervene when someone merges into the lane/etc can't really be understated.