Jacob@jvboid
The main idea of an exocortex is that it's another layer of intelligence on top of your existing layers.
See from a conceptual perspective, the brain can sometimes be viewed in terms of layers. Our neocortex is only called a neo-cortex and not neo-something-else because the word "cortex" meant bark in Latin (like the bark on a tree); ie, the neo-cortex is a new(neo)-layer(cortex) over the subcortical brain beneath it. But rather than fill the role of the layer beneath it, the neocortex has instead generalized to perform many of the nice-to-have features which couldn't fit before. This in turn has freed up the subcortical structures to differentiate even more than they could previously.
And so it is with the Exocortex. It will offer greater information processing capacity, generalizability, and cognitive freedom than any layer before it! Eg, this will empower the triune brains that it becomes a part of to automatically recall/search thoughts!, to recognize patterns too big for human STM!, to run hard simulations of thoughts before executing them!, yada yada *unfiltered tech bro ambitions for humanity*
(And to all you neuroscientists, please forgive me; I'm not trying to resurrect the triune brain, but the layered model is just really concise for explaining to tech twitter)