That's part of the reason for their success. They iterate rapidly and learn from their mistakes. SpaceX destroyed nine Falcon 9 boosters and one test booster (G

That's part of the reason for their success. They iterate rapidly and learn from their mistakes. SpaceX destroyed nine Falcon 9 boosters and one test booster (Grasshopper) before managing to land one. Now they have more successful consecutive booster landings than any other rocket family has had successful consecutive launches.