As I recall, the Space Shuttle used three identical computers for control. I think each actuator used a "voting" system so that if one computer disagreed with the other two, the actuator would respond as the majority dictated.
This Flyer has ten propellers. The cost of computing power is now so low that I can imagine multiple computers dictating the behavior of the propellers and a similar voting system to allow for multiple point failures.
Many modern jets can fly with an engine out. It wouldn't surprise me if the Flyer can fly with one or two (or perhaps more) propellers out.
I think many communities in the early days of the automobile treated them as experimental and greatly limited their speed. Much progress on flying cars remains to be made. The cost of running out of fuel on a highway is a clogged highway. The cost of running out of fuel in a flying car needs to be addressed.
The question really boils down to whether the flying car solves a significant problem without creating even bigger problems. I would guess that it does and that our grandchildren or great-grandchildren will be using them and wondering how our generation got along without them.
The machine probably has an auto-landing mode such that it’ll touch down before running out of fuel in mid-air.
Yes, this is in the infancy state, no doubt about it. It’ll be interesting to see how this evolves in the next 30 years. My kids will be around to see it.