Why haven flying cars been invented yet?
Flying cars have been invented and built. Several working prototypes of various configurations have been built and flown – at least one first flew several decades ago (with removable, stowable wings), so it is not even a new thing. They are not mass-marketed for a variety of reasons including safety, cost, regulation and infrastructure.
Flying cars are on the horizon (pun intended 🙂 A French scientist has developed a sort of “anti gravity” device that he calls a “lifter.” He has published detailed plans for small lifter-powered craft and theory of operations on his web site. Over the years, he has built larger and more capable aircraft based on his research. And countless home experimenters around the world have successfully duplicated his results. We’re still a few decades away from “flying cars,” but what he and people around the world have accomplished is amazing!