Few of those NAV systems on Bizjets do RNP, and even fewer do it well (e.g., RNP .1) ...as all new modern air transport jets now have done for over a decade, with advantageous and much safer RNP based procedures, in places like at PAJN, NZQN, or CYLW. None in the Bizjet fleet (that I know of) yet do GBAS based GLS, with associated RNP legs either. All of which (i.e., RNP + GLS) is the future ICAO global standard for NAV. Hence, those BizAv avionic systems will all, including even the latest Easy, Proline, and Garmin models, likely end up being prematurely obsolete. This is particularly true since they focus on "straight-in angular criteria LPV", which horrendously wastes valuable terminal area airspace in busy metro areas, and can't serve complex paths to runways at critical locations where most needed, and thus are already becoming obsolete.