 There would be no need for fuel cells or cryogenics, and modern guidance and communications would be lighter and less expensive.Although the flight hardware would be less expensive, and its impact on the Expendable Launch Vehicles would be minimal (it's just another axisymmetrical payload), the landing sites for the CRV may drive the Life Cycle costs high.By adding a Service Module (smaller than the one required to go to the moon), orbital cross-range of 3000 to , might be gained, and the number of landing sites radically reduced.