We fly our bizjet around the Pacific on air ambulance and we need to fit the requirements of FAA, EASA, NZ and CASA for avionics. It cost considerably more to get it future proofed including ADSB and TCAS RVSM etc for all the territory's we operate in. We needed a 50 something parameter data/voice recorder and we now find New Caledonia and Tahiti require TCAS 7.1 instead of the 7.0 we got..point is, your CJ would be a lot more attractive if it qualifies for everywhere and approval from an authority to operate RNP-1 arrivals wouldn't hurt either