I reckon the best use of self-drive cars is in a bit more modest position in the market, small electric cars for a mixture of shared use /taxi /hire.
Where I live, there are households who could do quite well enough on just a share of car use, rather than owning the whole thing.
One of the retired neighbours doesn't own a car. We met her by chance at the supermarket and gave her a lift home, but otherwise she seems to be spending £5 or £8 or so each way on taxis, and has modestly turned down her next door neighbours' offers of regular lifts there
About a mile away is a railway station which 40 years ago used to have 0 or 1 car in the car park, but now has 150 or more there and in the nearby roads. What is the point of owning a £20,000 or more car and parking it at the station for 60 hours a week?
A self-drive car could pick up 3 or 4 people and give them a lift to the station, do this in 3 or 4 rounds morning and evening, the odd few people for some of the trains during the day, stay on charge in between, still work out quite a bit cheaper than a taxi that not everyone would want to fork out for, and far better than tolerating all that depreciation on probably a family's second car