The approach that Elon Musk is pursuing with Neuralink is for humans to maintain intellectual parity with AIs, so at no point is AI more intelligent than humans. Musk wants to break down the notion of AI as “the other”, to the point where we all ultra-smart. We achieve this state by having an AI extra brain, so we end up being part AI and part human. The basic idea is that the brain has about 100 billion neurons, and the goal of Neuralink is to attach a sensor to each of those neurons: a sensor that can tell what binary state a given neuron is in, and also stimulate the neuron to be in a different state.