Isn't most of M1's performance success due to being a SoC / increasing component locality/bandwidth? I think ARM vs x86 performance on its own isn't a disadvantage. Instead the disadvantages are a bigger competitive landscape (due to licensing and simplicity), growing performance parity, and SoCs arguable being contrary to x86 producers' business models.
ARM instructions are also much easier to decode than x86 instructions which allowed the M1 designers to have more instruction decoders and this, IIRC, is one of the important contributors to the M1's high performance.
Umm, Intel laptop chips are SoC with onchip graphics, pci4, wifi, usb4, and thunderbolt4 controller, connectivity direct to many audio codec channels, plus some other functionality for dsp and encryption.
