Those white plastic laptops of Apples got quite a few calls into their support center.
#1: yellowing and cracking of plastic.
#2: Hard drive failure
#3: Battery failure
I think with the 3 items combined, the failure rate must have been in the high %30 mark.
Anyone that owned one shoudl be able to verify that.
Hmm, I was service manager at an Apple authorized computer store. Fixed hundreds of white plastic MacBooks. I would think that, given a long enough timespan, you could get to 30% failure on those three items, collectively. But certainly not within warranty, and generally not due to manufacturing defects.
I never saw any yellowing that wasn't caused by abuse. And I mean cigarette burns, being left on top of a radiator, etc. Cracks on the keyboard bezel, sure. That WAS a design flaw. Cosmetic only, BTW - didn't affect function. Apple fixed them all, in or out of warranty.
Hard drives fail. Apple doesn't make them. Look up the manufacturers specs for G's of impact in operation, and compare that to the way MacBooks are used. Mostly by students... We had one guy who was using his laptop on the seat of a moving, off-road truck. Apple replaced that hard drive, four times that I know of, in and out of warranty - at no charge. Eventually he got a free upgrade to an Air, with SSD. Solved.
Battery failure. Well, batteries are expendable items. I would say 95% of the batteries replaced were over their rated lifetime cycles; usually WAY over. The few that weren't, were also replaced free, in or out of warranty.