((That's not an entirely good analogue, GWG, because a smartphone cluster linked into cloud computing can still function as a processing core. You get some latency, but individual processes can be carried out, and distributed memory works as well. That's the actual issue with having a distributed brain - your individual segments would have delays in interacting, meaning that things like visual memory and associative thought will be very sluggish. You trade that for an increase in redundancy and survivability, plus an increase in basic, reflexive reaction speed if you have the setup for it, but you don't think any clearer or faster on the overall.
((Wait, I'm confused. First you say my analogy isn't good, then you say that it hits the nail on the head.))
I should say that in combat, preparing for taking a whole lot of damage to unspecified areas of the organism, the distributed nerve system can actually be a benefit. A central nervous system is too obvious a weakspot, and there are limits to how well it can be protected. Splitting the whole thing up into an equivalent of a cloud computer/RAID array allows to take damage without the whole thing ceasing to function. And if you turn yourself into a 16-legged chitinous combine harvester that needs no actions more complex than "find hostile organic, kill, consume", the slowing of cognitive functions won't hamper you too much.))
((Yeah, but who would want to remove their ability to function on a human level just to be...oh, right.))