IIRC there was at least some work done in the 80's and 90's about neural networks where neurons were located in a 2- or 3-D space and could emit "chemicals" tha

IIRC there was at least some work done in the 80's and 90's about neural networks where neurons were located in a 2- or 3-D space and could emit "chemicals" that would "diffuse" through the simulated environment and influence neurons' behaviour depending on local concentration. Nothing new here, but maybe the idea is worth another look. Wouldn't be the first time an old idea turns out to be a really good one decades after it's first inception. It might be that the ground is now more fertile for this than three decades ago. Still, please note that the critiqued comment did not even go as far as to even suggest an idea about the mechanisms involved beyond (implicitly, not even explicitly) "somewhat like in the brain". There's just not enough meat there to even do a proper critique, and on this basis I pulled the "Not even wrong"-card, which is of course at bit harsh, but that was the whole point about trying to put myself into the position of a downvoter.