When the first non-optical drive MBP came out LG screens were notorious for retention. I traded in 5 of those for the screen alone. I also got Apple care and 2 years later the Samsung screen was replaced with an LG when it got damage. Luckily it had very minor retention. In 2017 I returned 3 MBP because the LG screens was just more faded than Samsung which tend to be look warmer for me. Some people also prefer the LG screens due to PWM issues but those don't affect me. Then the keyboard gave out. MBA M2 I think I went through just 2 so Apple is getting better with their QC. This is just Macbooks alone.I've literally never bothered to check into this and my experience with displays has been fine. The one exception I can think of was my 5K iMac, which developed some image retention. Had that replaced under AppleCare and went on using it just fine.
The trade in was way worst for iPhones and especially iPads(I think I returned/rebought 6 M4 13" because most of the screens are so bad), I paid premium money so I kinda expect a premium product. The customer service at the Apple Store is great though, I think the one in Northridge knows me by name at this point.