We had quadriplegics using brain-computer interfaces to control computers since the 90s. We had neuro implants giving sight to the blind since the 2000s. The problem is not making it work at all, the problem is making the implant work in the long-term in a way that the body doesn't eventually reject. Neuralink is still catching up to where we were 20 years ago, only fronted by a dancing monkey trying to hype himself up as the technoking.