I think the complaints are fair based on the title of the HN post which indicates that this is a visualization of a biological neural network, which it empathet

I think the complaints are fair based on the title of the HN post which indicates that this is a visualization of a biological neural network, which it empathetically is not (it's not a true representation of any kind of neural network, at least not that I know of, but a visualization of graph traversal where the graph happens to look like a brain). So, it is cool -- extremely pretty -- but fairly misleadingly named in my opinion. It could be more accurately titled, "An artist's rendition of a brain".