True. It becomes more of a power consumption advantage, because instructions that use those stricter memory semantics are explicitly marked. Also, even with th

True. It becomes more of a power consumption advantage, because instructions that use those stricter memory semantics are explicitly marked. Also, even with those instructions there are still things ARM can't currently do. X86 can and will do misaligned atomic updates (as long as it doesn't cross a cacheline). ARM can't.