but have never had a set of Oakley polarized lenses last more than about 18 months before they start “delaminating”
I had the same problem on a really nice set of Crosshair frames, the mirrored coating started coming away from the polarised lense, at first I thought I had scratched them (despite being very careful with them), then left them in the case for a month or so, next time I checked them a large area of the coating had come away. Oakley were pretty unhelpful about it, although did give me a discount on a new set of glasses. Oakley seem great in sorting out issues with frames (I have had replacement frames FOC from them before) but for some reason aren’t great in backing their lenses.
I do have a pair of Flakjackets (bought as seconds) with polarised lenses and they have been fine for a few years.