Legal liability seems like a much cleaner way to define autonomy for the general public than the SAE levels. If the person is responsible anything the car is doing is assistance or aid. If the manufacturer owns liability it's some level of autonomous. There needs to be some kind of law about how long the car has to alert the driver before handing over liability, but beyond that it's a much cleaner divide.

This would also solve issues like Tesla naming their level 2 systems 'Autopilot' and 'Full Self Driving'. I love my Model 3, but those names are deeply misleading at best and downright fraudulent at worst. The FTC really needs to step in and regulate what manufacturers can claim based on liability.