Re: Confusing much?
More confusingly, there are a few extra half-steps in there. All of PowerPC, x86 and Arm have had architecture changes from 32-bit to 64-bit versions within those steps (32-bit Arm only on iPhone though). These sneak past because the hardware itself manages a lot of the backward-compatibility, so hardly anyone whinges, but they are extra instruction set changes that have to be handled by the OS and software ecosystem (compilers, developers, etc).
The upshot is that Apple developers are really quite good at it by now, after all that training.
Biting the hand that feeds IT
