It might demonstrate partial in-orbit refueling. If everything goes optimally right in payload capacity of Starship, it takes 8 refueling flights to completely

It might demonstrate partial in-orbit refueling. If everything goes optimally right in payload capacity of Starship, it takes 8 refueling flights to completely refuel Starship. Achieving fast launch cadence and the full 150 ton payload Elon has announced will take years, assuming refueling is fast enough to prevent boil-off of significant amounts of fuel and waste due to incomplete transfer. Early design choices and the goal of 100% rapid reuse of the upper stage makes Starship depend on everything going right on a large number of parameters.