NAPA's battery replacement warranties have always lagged, even before others began to weaken theirs.
Supply chains differ by region, and at any given time, what is on the rack is what is on the rack, whether Clarios, EP, Korean, or whatever. For everyone, not just NAPA.
And as with every other retailer, the risk of finding a thick coat of dust on them is not out of bounds, cheap or expensive, given past experiences detailed here. If anything the low-turnover big-$ niche batteries are at greater risk of being old stock.
Ironically, I've had greater difficulty getting NAPA to honor their corporate promotions on the site than the local NAPA store. They local counter guys may grumble a bit about the site and national, but the printed national flyers are always honored.
I'm glad to have a pretty good local NAPA as an option, but not enough to keep their emails coming, with the uncertainty that the sales other than the flyers bring.