Maybe, but my guess would be that there's a trade off made here. Either you can use higher dimensionality in the abstract, or you can have a much much bigger br

Maybe, but my guess would be that there's a trade off made here. Either you can use higher dimensionality in the abstract, or you can have a much much bigger brain. A bigger brain processes slower merely because of volume and requires a lot more resources to support it. Nature stumbled onto the path that it did because we don't have high enough nutrient food or fast enough neurons.