So the novel ("novel") idea that M1 is bringing is using high bandwidth LPDDR5 for desktop CPU memory, where it's currently typically used only for mobile CPUs. [1] Intel and AMD CPUs technically support LPDDRx, but no manufacturer exploits this for some reason. [2]

[1]: https://www.bgr.in/top-products/best-phones-with-lpddr5-ram-...

[2]: See other thread. :)