Your NOS tube order has finally arrived! You joyously unpack the precious new music bottles, only to drop them on the floor. They break, releasing the genie who has been imprisoned there since the 1940s.
As a reward, he grants you one very specialized wish: you may choose one technology that you feel should never have been invented, and it will vanish from the universe, erased from history as though it had never been.
What technology would you choose? The words, "Leaf Blower" would burst spontaneously from my lips.