That's an odd experience with Bluray, given that most players simply can't connect to the internet so could never download updated keys.
To me it sounds like a PS3 specific thing, rather than a problem with Bluray. I get that to you the experience is poor regardless but the problem to me sounds like Sony rather than Bluray.
From what I've read online, this is a common occurrence on many blue ray players. The AACS keys expire every 12-18 months and require an update if you want to play any movies with newer keys.
I don't know how this is handled on older, unconnected players.
To me it sounds like a PS3 specific thing, rather than a problem with Bluray. I get that to you the experience is poor regardless but the problem to me sounds like Sony rather than Bluray.