not sure if you meant "car miles" when you said sales, but another point: * Cars are way more reliable than even 10-15 years ago. Growing up my parents had a r

not sure if you meant "car miles" when you said sales, but another point: * Cars are way more reliable than even 10-15 years ago. Growing up my parents had a rule of thumb that a car was a ticking bomb over 100k miles. Today, a car from a reputable manufacturer is just getting started at 100k. I do think this has some interesting ramifications as the lifetime of a single car starts to increase - at a time when the tech in a car (e.g. driver assists/self-driving systems) is starting to iterate very rapidly.