Personally I do not entirely buy it. Intel and AMD have had plenty of years to catch up to Apple's M-architecture and they still aren't able to touch it in efficiency. The PC Snapdragon chips AFAIK also offer better performance-per-watt than AMD or Intel, with laptops offering them often having 10-30% longer battery life at similar performance.
Personally I do not entirely buy it. Intel and AMD have had plenty of years to catch up to Apple's M-architecture and they still aren't able to touch it in efficiency. The PC Snapdragon chips AFAIK also offer better performance-per-watt than AMD or Intel, with laptops offering them often having 10-30% longer battery life at similar performance.
The same goes for GPUs, where Apple's M1 GPU completely smoked an RTX3090 in performance-per-watt, offering 320W of RTX 3090 performance in a 110W envelope: https://images.macrumors.com/t/xuN87vnxzdp_FJWcAwqFhl4IOXs=/...