> So, if developers start publishing "Fat EXEs" that were actually in a different non-PE format, then you're not going to be able to use those on any older oper

> So, if developers start publishing "Fat EXEs" that were actually in a different non-PE format, then you're not going to be able to use those on any older operating system. Couldn't the ARM code be put at the end of the x86 code, so operating systems unaware of the change would run the x86 code like before, but the ARM devices shipping an updated version of the OS would skip to the ARM code.