The development and deployment of DFS-based 5 GHz spectrum-sharing technology has arguably been largely successful, though achieving this success has required considerable use of government resources on an ongoing basis. As spectrum sharing between radars and non-radar systems are considered in other bands, the lessons described above ought to be heeded. Fundamentally, substantial resources will likely be needed to support sharing in new bands. These resources will be needed on both the front end (in design and development phases of sharing technologies) and at the back end, on an ongoing basis after such technologies have been deployed. It is unlikely that complex spectrum-sharing schemes between radars and non-radar systems will ever be fire-and-forget in the sense that they can be deployed without the need for ongoing work by engineers and spectrum managers to keep them functional.