We spent months agonizing over an interior temperature sensor, which was only used to display the information to the user on a smartphone app. We built both the hardware and software, and it was offered as an add-on at the dealerships. After months of negotiations, after the hardware was already built and the packages assembles, they decided temperature sensors were too inaccurate (+/- 5 degrees F) to use, and that it could present a legal liability. Again, this was nothing else but displaying the information on the app - and the user could then make a decision whether to remote start the car to cool it or heat it (no automatic process took place either).
This was at the height of "unintended accelerator" issue in Toyotas, so everyone was walking on egg shells playing it ultra safe to not invite any more lawsuits.
What surprises me is that this culture of "playing it safe" remained to this day, some 10 years later (but maybe it shouldn't).