So it happens on Blu-ray's as well?
Not quite the same problem but I pointed this out because people need to immediately open their BluRays after purchase and make sure they work! Durrrr...
What happens is I stop by Walmart, BestBuy, Target, MicroCenter, etc. to occasionally build up the home theater library, especially on Black Friday sale events. If good BluRay classics sell for cheap, even if I seen them many times on DVD, I'll grab them for storage until the day I buy my LG OLED 65" dream TV to truly complete the home theater with rocking surround sound!
I have a 43" 4K TV (LG TVs ARE fantastic as PC monitors too!) for my workdesk/bedroom, but my theater system area was still sticking with a 32" Panasonic CRT, nearly my last attachment to CRT as I threw many away aside from a small 13" one for RGB mod testing/study/learning.
Anyway, I bought many BluRays of the greats like Predator, Total Recall, Matrix, StarGate, Aliens, RoboCop, Terminator 2, The Fifth Element, Batman/The Dark Knight, etc. stuff I'd wanna watch again on a beautiful LG 65 incher eventually, but I left them in shrink wrap and didn't think, "Duh, better make sure they work..." Well, that was a mistake!
Turns out Warner Bros. had bad batches go loose right from the factory (happened to Sarumaru with Project Yuki even), so they instituted a hotline to exchange bad discs. I tried, returned mine in paid-for envelope they sent, I got back a Superman DVD which ironically used to own another copy of but gave to my friend AFTER upgrading to BluRay a year back, hahaha!!!! Thanks for trolling me Warner Bros.!
What sucks now is for the movie library I built up, I want such movies in beautiful, luscious 4K resolution BluRay instead, I stocked up on 1080p which doesn't compare to 4K in quality... But such is the dilemma with upgrade mania, 8K is around the corner too, and someday we'll be able to buy physical media in the same resolution as what the movie was shot in which would end the upgrade cycle for the most part (can't do better than theater resolution).
Point is these bad batches right out from the factory don't speak to the longevity problem, things like disc rot. A good BluRay is supposed to be long-lasting and very scratch-resistant given the tough coating that's used compared to any prior optical disc technology.