It all boils down in the end to needing RNP and GLS
Oh when will we ever learn? The answer is simply properly implemented RNP and GLS.
Since TWA 514 and long before,... to even before AL371, AL736 & AL737 (which gave us 25.1309), ...and still before Ed Burke and the All-Weather Flying Committee (and long before the Larry DeC, and Joe O, Wally R era, and the L1011)... we've needed REAL RNP, ....and by the '90's, needed GLS/GBAS.
It is time to finally recognize that fact, and globally implement "real" RNP and GLS (not FAA's RNP "lite"), to every jet runway end globally. Then we dump obsolete and wasteful SBAS/WAAS, LPV, NPAs, and much of TERPS, PANS-Ops, and other obsolete concepts and critera, and stop pushing stopgap faux solutions for low visibility landing accidents, reference trying to blame it on training, fatigue, experience, PAPIs, GPWS, TAWS, or the need for placebo ineffective expensive new fad EVS/SVS eye candy...