Service Ceiling for New Cessna Jets
Cessna has introduced a slew of new airframes , Hemisphere, Longitude, Latitude etc. All have a service ceiling of FL450. The Citation X as well as Learjet, Bombardier jets, Gulfstreams are still capable of FL510.
So why has Cessna limited the new airframes to FL450.
Are flight levels above 450 so seldom used even in 510 capable models that the cost of certification above 450 not worth it.
So a question for the bizjet drivers in FL510 capable airframes, how often do you actually cruise above FL450? It's rare to see anything on flight radar24 above FL450 except for Citation X's and G650's. i do notice that FL410,420,430 are getting increasingly crowded over Europe & North Atlantic. Is there a benefit traffic-wise to going above FL450?