There's no laptop that doesn't need spare parts. Even if some model is known for reliability, it doesn't matter when you're suddenly the unlucky one. Or when it drops on the ground and something cracks. Not that I have perfect information, but in a calculation similar to insurance - I'd rather have something a little bit less reliable but with cheaper spares/repair than "perfectly reliable" but needing a full replacement. (Or apple's "we can replace all of the inside or all of the outside")