> Every iOS app already runs natively on Intel. For simple apps this is more or less true. More complicated cases might not behave same. For example, ARMv8 a

> Every iOS app already runs natively on Intel. For simple apps this is more or less true. More complicated cases might not behave same. For example, ARMv8 and x86 have different memory models. So execution won't be equivalent. You can have concurrency bugs in your code that only manifest on ARMv8. I'm sure there are a lot of other examples of differences as well.