1. A hurricane is coming and we need to evacuate!
2. We want to pack a family's worth of luggage and take a sight seeing roadtrip of the US.
3. Sure would be nice to visit my parents who live in rural America where no planes/trains/busses go.
4. There exist bad parts of town that police, cabs, and Uber refuse to go. How will people who live in those areas even go anywhere? Walk 10 blocks so that they can hopefully find a Bird scooter to drive the doctor?
I feel like this author is ignorant about the conditions of many Americans. I don't see at all how owning a car will be considered "quaint" when our modern lives are built around owning a vehicle.
There's so many safety issues that arise from not owning your own transportation. Ignoring those, there will need to be a lifestyle/cultural shift to remove transportation independence from most Americans. And ignoring that, you'll still need to be okay with giving your freedom of movement to a private company. Better hope Uber/Lyft/Bird/etc don't ban you, or you're really screwed.