x86 lock-in benefits AMD greatly, just as it does Intel. It is my belief that they started looking at ARM cores when they thought they would never be able to be competitive with Intel in x86 (pre-Zen was a bad time for AMD). And when it became clear that actually their new cores would do very well against Intel, they dropped ARM plans. They don't want to move off x86 if they don't have to.
Intel Xscale were a different beast. They got that through StrongARM from DEC as part of some law suit wheeling and dealing. They never seemed to really want to push it, preferring instead to try competing in mobile with a string of failed x86 cores.
Intel Xscale were a different beast. They got that through StrongARM from DEC as part of some law suit wheeling and dealing. They never seemed to really want to push it, preferring instead to try competing in mobile with a string of failed x86 cores.