One method is spending money on sensors, the other is on gathering as much data as possible (cheaper sensors, but put in all cars). In 20 years we'll probably

One method is spending money on sensors, the other is on gathering as much data as possible (cheaper sensors, but put in all cars). In 20 years we'll probably have good enough algorithms that can work with few data and cheap sensors, so it's just a matter of time until the 2 methods converge.