Like any commodity product, there's a lot of variability in the manufacturing process. Some are cheap Chinese crap; some are good quality Chinese stuff. Perhaps a little is still good American stuff.For the record, LED'S do not last forever.
They make them pretty cheap, and they do fail.
We've been installing a lot of them at work, they're really nice, but they're not made to last.
I wouldn't be surprised if one of those panels in my lights burns out at some point. I had a Perko LED nav light burn out recently because sea water got inside the housing and corroded it. OTOH, I have 15 small LED recessed lights in my kitchen from a reputable manufacturer. I expect them to last a very long time.