I must be the odd one out. I've never, ever, borrowed money to buy a car, nor had one on hire purchase, a lease, or any other money-making enterprise aimed to make something more expensive. My grandmother was fond of quoting Polonius (from Hamlet): "Neither a borrower nor a lender be, for loan oft loses both itself and friend, and borrowing dulls the edge of husbandry."
If I've not been able to afford something, I either go without or wait until I've saved enough to buy it. Not owning a car around here (in more normal times) means not going anywhere. It wouldn't be practical to live here and work anywhere nearby without a car, unless you happen to work on one of the local farms and live in a tied cottage on the farm. Public transport is infrequent, although there is a community operated minibus service that operates twice a day, but that's really to get to the shops, so isn't timed for normal working hours.
I can understand those living in places well-served by other forms of transport not bothering to get a car. My nephew has lived in London his whole life, didn't pass his test until he was in his early 30's and still doesn't own a car, he only took his test so he could hire one from time to time. It may well be that autonomous ride sharing will eventually operate in rural areas, but a lot will hinge on how much it costs. A return taxi trip to the nearest supermarket costs between £45 and £55 at the moment, so that's probably about the price to beat for any alternative.
In rural areas, things may well get much worse, as autonomous transport starts to operate in urban areas, I think. The local bus service, such as it is, makes a pretty heavy loss on most of the rural routes, so relies on the volume of passengers in urban areas to keep it profitable. If those passengers are lost to autonomous ride sharing vehicles, then rural public transport will either just stop operating, or get a lot more expensive. I suspect it will end up being a choice between owning a car or using a taxi for a time, until autonomous vehicles are both technically capable, and affordable, as rural transport.