Reusable rockets are here, so why is NASA paying more to launch stuff to space?

Space launches have become far more frequent than ever before, yet NASA continues to pay higher fees for missions into orbit compared to 30 years ago due to rising demand from multiple customers, including SpaceX, which has significantly increased its capacity. A study in Acta Astronauta reveals that these costs have climbed at an annual rate of about 2.8%, unaffected by the addition of a new provider until now, likely attributed to inflation and the combined demand for launch services from various entities.