Again, it has been over 20 years since ISA has mattered for performance in a head-to-head matchup between comparable CPUs. Moore's Law has thoroughly done away

Again, it has been over 20 years since ISA has mattered for performance in a head-to-head matchup between comparable CPUs. Moore's Law has thoroughly done away with it as a factor in performance. Relative code size (and cache/memory space + bus bandwidth) of RISC vs CISC, "x86 tax" of translating into micro-ps as a percentage of the die area, register file size, load/store, and everything else you can think of have all fallen away as real performance factors as transistor counts have soared and compilers have improved. There are so many things that matter for performance now, and ARM vs. x86 ISA just isn't anywhere on that list, and hasn't been on it for a very long time.