[wutbrodo]

This seems like an odd argument to me: "enabling efficiency isn't useful if you assume people's habits won't adapt to the new status quo". Once you've moved personal vehicle use of the sort you describe from essential to luxury, I don't see why you couldn't make users bear the cost of their frivolous externalities.

[orbifold]

There is no way people would give up owning their own car outside of very dense urban centers. Everywhere else it would neither be practical nor desirable to wait for a rental car to arrive.

People also tend to store lots of personal items in their car.

[wutbrodo]

There are any number of things that seemed utterly critical and timeless to the myopic of their time that are either anachronisms or at best optional today. "There's no ways people will live in apartment buildings", "there's no way people will give up their horses", etc etc

[lozenge]

Why do you think people will choose to rent a self driving car instead of owning one?

[wutbrodo]

For the same reason I use a combination of transit, Ubers, and rental cars to get a far better experience than car owners at a fraction of the cost. For the same reason that the average person gave up horses and large plots of land and indoor woodfires for heating and cooking: if something is horribly inefficient and costly relative to an alternative, eventually society stops subsidizing it, and the only ones left doing it are the highly irrational or the highly passionate (compare horse ownership 150 years ago to now).

There are obviously advantages to owning a car that transport-as-a-service doesn't offer, but the point is that once an alternative is available that's better from a global utility perspective, it doesn't make any sense to subsidize the costly decisions of the irrational (barring interest groups that we as a society choose to explicitly subsidize, like families or the disabled).

[imtringued]

I don't want to depend on a taxi. I have to drive to work NOW.

[wutbrodo]

Well, obviously. This isn't something you turn off overnight if the alternative infrastructure doesn't yet support it. But you could make the same argument if pretending it's a necessity about any of a million things that don't exist in modern society today. If your definition of what you're entitled to is no different from the status quo, you're barely even coherently engaging with conversations about how society can and should evolve, improve, or maintain its normz and policies.