@thomasfuchs That timeline is bunk but they haven't admitted it and adjusted yet (as Destin noted), the launch cadence is do-able on Falcon 9, they are already launching them with this kind of frequency, but Starship is still in the design/prototype phase, they haven't yet built a complete rocket as they are still testing components, but each prototype has been more complete than the last so the trajectory toward completion may be fine, just not with that date.