If cars drive by themselves by 2030, then would US still need 300M vehicles ? I own an EV now for 4 years. My commute is only 20min x 2 per day. I only charge

If cars drive by themselves by 2030, then would US still need 300M vehicles ? I own an EV now for 4 years. My commute is only 20min x 2 per day. I only charge one night per week. Not all EV charge every single night, and in full. It would be nice to charge at work during the day, even at lower rate/speed when sun shines and wind blows. Maybe by making it easier for companies to offer charging at their parking lot would help ?