Doesn't obfuscating the location of the defroster control run afoul of the NTSB safety regulations since a window defroster has been required safety equipment in all cars since the early 70s?
If your smoke detector manufacturer changed how the test button worked with an over the air update, and as a result you failed to correctly test it, who would be liable?
Much in the same way, if someone cannot figure out how to use their defroster because a UX engineer decided to make it just so, the Tesla owner just drives off with a mostly iced up windshield because, and the Tesla owner gets into a crash because it's 7:00am on a cold winter Monday and they're running late, does Tesla share some liability for changing how basic safety equipment works?
Relevant statute: https://www.law.cornell.edu/cfr/text/49/571.103