Not a useful comparison. A single neuron is far better networked to its neighbors and far more complex/nonlinear than a transistor. There are already chips out

Not a useful comparison. A single neuron is far better networked to its neighbors and far more complex/nonlinear than a transistor. There are already chips out there with 1e11 transistors, but they don't run "ai" even a little bit. Assuming you need something like 1e5 transistors to approximate one neuron, you'd need like 100m^2 of die area and interconnect to actually emulate a brain.