Elon Musk announced significant progress in SpaceX’s rocket reusability, a goal set 13 years ago. Responding to a fan video, Musk revealed that the Falcon 9 rocket is now about 75% reusable, requiring several days between flights. The Starship, designed to be 100% reusable, could potentially refly within an hour of landing. Musk emphasized that this advancement is crucial for becoming a multiplanet civilization.