> We only need so many launches, especially super heavy rocket launches before we run out of payload. And if they build as many rockets as they have engines for

> We only need so many launches, especially super heavy rocket launches before we run out of payload. And if they build as many rockets as they have engines for, where are they going to store them? What about the launch pads? Etc... The explicit goal, as has been stated several times by SpaceX leadership in the past, is for Starship to eventually cannabalize Falcon 9 and Falcon Heavy launches. They've said they'll keep launching them as long as there is demand for them, but there will be more and more incentive for companies/governments to stop buying Falcon 9 launches. Already SpaceX sells some launch contracts for "arbitrary vehicle" launches where SpaceX can elect to launch the spacecraft on Starship instead of Falcon 9/Falcon Heavy if SpaceX so wishes.