Well the average cost per mile for running a car in the UK is 40p per mile. If you can "hire" a driverless car for 40p per mile or less then little point in owning your own car anymore.
Average cost is now £3000 per annum (mainly cause all the old bangers pulls down the average as depreciation is only £1104 per year - newer cars will be more than £1 per mile) . if you dont do many miles £3,000 pays for a lot of self drive "taxis". Newer cars will be closer to £10k per annum to run.
https://www.nimblefins.co.uk/cheap-car-insurance/average-cost-run-car-uk
And there’s the fundamental point that you’ve completely missed with your response. I said you also need to consider the non-economic reasonings why people do what they do and you countered that will a wholly economic argument which just doesn’t stack up in the real world.
If everyone only looked at the economic argument then your correct, no one would buy cars and public transport would be king but it just isn’t how peoples decision making works.
You also need to factor in the perceived benefit of owning your own vehicle, particularly if you can afford it, e.g. flexibility, piece of mind, not having to store car seats in your hall way and install them every time etc. Self driving cars may end up being cheaper but they are just objectively worse in every other metric.
For example, there’s only so many times where a person who can afford to own their own car is going put up with a driverless car turning up and it containing someone’s left over take away or bodily fluids before they think ‘**** it I’m just going to buy my own’.
Let’s be realistic, these cars will be unsupervised but that doesn’t mean people aren’t going to be people. There is a reason why regular taxis all have ‘leather’ seats and fully lined plastic mats and those are the ones that are supervised….