... and the hardware can vary greatly from chipset to chipset and from phone to phone. There are a number of drivers that work directly with the underlying chip

... and the hardware can vary greatly from chipset to chipset and from phone to phone. There are a number of drivers that work directly with the underlying chip and hardware. You can never emulate that. The actual CPU (ARM, x86) is a small part of the overall emulation equation and almost inconsequential to uncovering these bugs you talk about. There will be bugs that will exist solely on the hardware. You can't replicate it unless you are fully replicating that hardware, with those system level drivers. IMHO, In the context of the app development what Apple did is the better way in this case.