I was basing my number on Wolfram's work here:
https://writings.stephenwolfram.com/2023/02/what-is-chatgpt-...
"In human brains there are about 100 billion neurons (nerve cells), each capable of producing an electrical pulse up to perhaps a thousand times a second."
So maybe that's wrong. Thanks for the links. Even so if we look out 10, 100, 200 years from now, that level of complexity will be greatly surpassed by AI.