The average cost of car ownership is $0.69 per mile without insurance, $0.25 per mile to store it, and $0.49 per mile in societal costs (death, injuries, delays due to accidents). So about $1.43 per mile. I do not enjoy driving, so would add more cost per mile, maybe some would want to pay more but I do t see that much joyriding outside of teenagers and classic car enthusiasts, so I don’t think those that do it for pleasure is a large population.

Tesla cybercab is targeting $0.20 per mile. Waymo projections are $0.40 per mile by 2030. Assuming both hit $0.50 and are twice as safe, this is basically $0.75 per mile.

I don’t see may paying more to drive themselves. And I think as society there will be non economic reasons human driven cars get banned. Like MADD but for human cars.

So I expect 5 years and human cars will not make sense in many cases, 10 years new human car sales to be <50% current levels, 15 years you start seeing bans. 20 years bans common.