A 2016 British study can give us an idea of how the car is being used. Results: most trips are rather short, with 95% less than 25 miles and 66% less than 5 miles. However, if you add all journeys below and above 25 miles, the results is about 50-50. The number of all trips, short or long, has declined over the past 12 years.
Combining the data, perhaps a compromise solution for future transport architecture could be: private ownership of a cheap, light-weight vehicle for 1-2 persons, like the Carver in the previous post, for the short distances, that still comprise 95% of all trips and do the rest with public transport, like bus and train and later autonomous driving vehicles. A range of 100 km would suffice for that purpose and allow for relative light batteries.