Apple's cases are nice, but "the best work in the world with [aluminum]" is a real stretch. They're not complicated or high precision, they're computer cases.
There are people making turbines with aluminum, and medical equipment, and machine parts that are accurate to an order of magnitude more than Apple's pretty phone case.
There are people making turbines with aluminum, and medical equipment, and machine parts that are accurate to an order of magnitude more than Apple's pretty phone case.