Translation:- Larry Page is spending millions of his personal wealth - which he is entitled to do - into a development quest to develop personal dual-use road/aircraft. This will never become economic, although is has been shown many times to be doable, with numerous products developed. None survived the economic screen, let alone the FAA screen. Let us see why:- Ever see a traffic jam? lines of 1000's of cars stoppe…
The air traffic control issues are surely the easiest aspect of the whole thing. It's just a large 3D pathfinding problem, the kind of thing computers eat for breakfast. I don't think anyone imagines they'd be manually flown.
One of the problems with denser and denser air traffic control is you can only speed up the computers. The flying objects still have speed, altitude, inertia etc and that sort of multipath problem (called the salesman's problem) soon becomes intractably complex.
https://en.wikipedia.org/wiki/Travelling_salesman_problem