WAAS is an entirely obsolete useless waste of money, as is LPV
With 30+ GPS SVs, and evolving 30+ Galileo and other SVs, and modern Kalman filters, and especially with networks of GBAS/GLS (which are needed globally for other reasons, for the next few centuries at least - e.g, FMEA and FHA elements like the 1000 year solar event)... WAAS is an utterly obsolete useless waste of money, that needs to atrophy and be put out of its misery at the earliest opportunity (unless of course somebody in GA or some other foolish taxpayer, or avionics company is willing to continue to personally foot the bill for it). The same goes for LPV (Laterally polluting vermin), which as another utterly obsolete angular artifact of obsolete TERPS and CRM (8260.3 as amended) ... LPV's "angular-straight-in" surfaces do absolutely NOTHING for solving airspace or approach issues, that RNP can't do better, simplier, cheaper, quicker, and SAFER (because ONLY RNP does the analysis for normal, rare-normal, and non-normal ops properly, both into the runway to the TDZ, and back out, 100% of the time).