I would agree with that.
But, I strongly disagree with Tom about the merits of LPV. LPV has made possible CAT I precision minimums for well over 1,000 U.S. light airplane airports that previously had lousy instrument approaches (IFPs) or no IFPs at all.
OTOH, the bar for RNP AR is set so high by the FAA only the airlines and high end business jets can enter that "club." For business aviation even those who have qualified RNP AR airframes, the price of qualifying and maintaining the equipment, crews, and avionics is simply not worth the price or effort to many of those operators.
RNP AR feathering to GLS may be wonderful in 20 or 30 years.