Mid 2011, Delta made this statement related to airline-created pilot training programs as a supply solution. Hardly a ringing endorsement of the concept but what he describes is more or less what JetBlue is proposing. Nothing has happened since to alter Delta's stance:
"Delta Air Lines is considering a "blue sky" theory for how to meet future pilot demands. Called "CAPT," for Civil Airline Pilot Training programme, the carrier stresses the idea is conceptual in nature and that it is not committed to the implementation, nor is it engaged in discussions with potential sponsors."
https://www.flightglobal.com/news/ar...ources-355820/