40 years ago we thought we'd have flying cars by now. Instead we have this

I've seen a few flying cars and bikes on YouTube. They're basically a big drone that can carry people. I think one problem with everyone having them, is that it's gonna be dangerous. When they crash into each other up there, the people in the flying cars will likely die when they hit the ground, also killing any innocent bystanders below. There's no air traffic controllers for them. They will have to make ones that fly by themselves and automatically avoid all obstacles.