Logistics at Apple scale is underappreciated too. I wouldn't be surprised if it's almost cheaper to stock/ship whole motherboard units than individual parts. A

Logistics at Apple scale is underappreciated too. I wouldn't be surprised if it's almost cheaper to stock/ship whole motherboard units than individual parts. And much easier to guarantee a tighter repair SLA. Inventory tracking, storing, shipping, and training don't come free. Especially if, as Apple, they can likely financially push back on their suppliers for some flaws.