NASA stands for National Aeronautics and Space Administration. It was formed from a pre-existing agency, the National Advisory Committee for Aeronautics (NACA), that did amazing work advancing the field, and that work never stopped within NASA.

Also, to be clear: between Milner's two (fantastic) projects, he has committed $200 M, to be spent over roughly a decade. NASA's budget is about $19,000 M annually. For fast, efficient progress we need both—large amounts of government resources as well as private-sector funding of ideas that NASA and NSF are overlooking or not prioritizing for whatever reason.