I have talked to many people about private cars (out measuring NO2 pollution in cities) and it seems that this is the main argument why they won't give up their car. Kids is another huge argument. Handling kid's gear with rentals or public transport sucks a lot.

My current thinking goes into the direction of small private electrical golf carts for cities since those fulfill the most important requirements given to me by those who say they'd never want to give up their car. One could even make them foldable and stack them upright when parked. Slow speeds mean that not much of a safety buffer is needed in the material.

Being able to make longer trips in the same vehicle is surprisingly low on the list. It is given mainly by people with kids who want to load the vehicle in front of their house and not have to pay for several vehicles (thus having a golf cart and a normal car does not sound appealing).