By 2035 any car manufactured today would be at least 13 years old. My oldest car is 20 years old, and worth basically one tenth - at best - it's purchase price

By 2035 any car manufactured today would be at least 13 years old. My oldest car is 20 years old, and worth basically one tenth - at best - it's purchase price (probably less). So realistically, old car stock will spend another couple of decades being driven till it's dust, and then it'll be gone. But this is a move which does need to happen soon, since you can reasonably expect another 2 decades of the vehicles on the second hand market after implementation.