Now the point of economic sustainability was always putting Starlink into orbit. That's something people in the space community have said from the beginning.

And both the booster and the Starship itself have proven that they can get back to ground mostly intact. So its not like they are only working on 'getting to orbit'. And clearly it is leading something desirable if the have proven that they can basically land the second and first stage, something nobody else has ever achieved.

Question how fast they can make the turn around are still there along with other question. But once you can repeatably launch you can improve much faster as they did with Falcon 9. And you can do more and more tests in shorter time, accelerating development.