[Worldtraveler once upon a time]

Airplane with four wheels. The entire game is "INVESTORS" -- come and give us money for this latest gizmo.

Imagine this "vehicle" and its wing span in LA, London or Rome traffic....

Imagine this "vehicle" and its wing span in the thousands on any urban road.

Marketing, courtesy of the NY Post.

[PilotDave]

Yup. We had very similar craft 50+ years ago.

https://en.m.wikipedia.org/wiki/Flying_car

[yesthatjallen]

Thousands of car accidents happen every day due to driver error or mechanical failures.

Imagine flying cars getting tangled in power lines, clipping the top of trees and buildings, running out of "gas", and falling from the sky.