Apple tends to be willing to pay more for the parts and they have very high quality standards.

That said they’re not immune. There have been a number of displays Apple used in the last few years with retention issues (I think the original rMBP has issues) so it’s perfectly possible.

If they made the gamble they must think it’s ok but as someone who plans to buy an X I can say it does worry me a bit.

Edit: another comment points out their keyboards. That obviously hasn’t been going well either.