Apple buries this info but the memory bandwidth on the M series is very high. Doubly and triply so for the Pro & Max variants which are insanely high.

Not much in the PC line up comes close and certainly not at the same price point. There's some correlation here between PCs still wanting to use user-upgradable memory which can't work at the higher bandwidths vs Apple integrating it into the cpu package.

They don't bury it. It's literally on the spec page these days. And LPCAMM2 falls somewhere between the base M and Pro CPUs while still being replaceable.

The new MacBook Neo is a less than half the memory bandwidth of the base model MacBook Air.