Is it? I was under the impression modern CPUs translate x86 instructions do on the fly translation to something else anyway. I’d be very surprised if that hardware translation process was making their chips 4x less power efficient (or whatever the number is).
Also as a consumer, the reasons why x86 stayed around as long as it did sound like a bunch of excuses. If x86 is really as inefficient as you say, then it’s about time the industry started sidelining Intel and moving to a better architecture with or without them. I’m hoping AMD follows suit before long and starts selling competitive arm or risc-v chips.
Windows 10/11 on an M1 Mac via parallels however has been the best Windows ARM device I've ever used and I have no trouble using it daily as my main work laptop.