is there a legal requirement to have them in a particular order? Otherwise, I'm fairly sure you could have a mechanic do that, although it could end up being fa

is there a legal requirement to have them in a particular order? Otherwise, I'm fairly sure you could have a mechanic do that, although it could end up being fairly expensive. To extend your analogy to the issue at hand, Apple are in the position of owning every mechanic shop around, and explicitly forcing them not to offer this service or risk being shut down.