[Spooky23]

Maybe this is my "old man" moment, but the magical world of 3D printed self driving cars that cost nothing really sounds like the flying car articles that you find in a circa 1960 Popular Mechanics.

[bordercases]

I think this is a good perspective to have, but it might dissolve when you look at the technicalities of either problem. Airspace navigation vs, say, 3D-printing the electronics and parts necessary to make what I assume are electric cars are quite different challenges.

Actually, saying that out loud makes me think that you're right.

[Spooky23]

I would have agreed with the flying around problem being super hard.

But now, we have guys in trailers on Nevada controlling swarms of drones all over the world. Amazon wants to deliver stuff with them.

Perhaps the airspace thing is an easier problem than the magic car! :)