I think scientists should consider a third possibility. That brains overall are actually far more computationally complex (or has far more state-based, CPU-like

I think scientists should consider a third possibility. That brains overall are actually far more computationally complex (or has far more state-based, CPU-like-behavior) than it needs to be for the intelligence involved in human actions. It seems plausible to me that the smaller the detail space one goes in, the more overall computation is limited by data-movement bandwidth rather than discreet computation operations. Intel has a couple extra CPUs in just sitting on top of their regular CPUs (manage engine and all-that). GPU computation is often bandwidth limited as well. So basically, perhaps it's possible to do storage and computation in multiple fashions in the brain and nature being nature, does all of them 'cause nothing prevents it. And that ultimately results in computation that might band width efficient but which only a bit of the CPU-like-processes because there isn't a way do things other ways.