I can see them having occupancy sensors after the first lawsuit, but before then I’m not so sure. Collecting your belongings from the dealer could also be problematic; you no longer have a car, and the dealer could be a significant distance away. It’d be even worse if you happen to have driven the car far from home and no longer have a way to get back.
I suspect, and hope, they only patented it so they were tge ones with the patent, not to actually implement it.