Because they didn't design the OS to do that. You very well could lock a core or two at low freq/power and assign background tasks to that. It's not really a ne

Because they didn't design the OS to do that. You very well could lock a core or two at low freq/power and assign background tasks to that. It's not really a new or exotic idea. macOS doing this is a side effect of them needing to do so, with the added benefit of it actually making things nicer all around. They could very well do this on intel/amd chips to the same effect. The bummer is, we really don't know how good the silicon is, because nothing but macOS runs on it natively, so you can't really get an apples to apples comparison.