Comment by atoav

Ok, and where does the energy to consistently keep a weight in the air come from and is it really worth spending?

I know flying cars are some sort of futuristic trope, yet I cringe at it every time I see it. They always assume magical infinite power. In the real the reason we do not have flying cars is the same why you don't use a drone as a coat hanger at home: It is just more practical to use a mechanical solution that holds your coat for infinite time without any energy use or noise/heat emissions and it is much cheaper.

Lifting stuff against gravity is not free, but a piece of wood, a brick or a rubber wheel does a pretty good job at it. One way to do it is magnets, but that means you need even more complicated roads.

We are living on a warming planet where only the naive and the evil pretend that energy use is something only the poor have to think about. We all have to think about it.