Important excerpts:

"While Mr. Musk is often optimistic with predictions for his companies, some of which have yet to pan out, Neuralink received approval from the Food and Drug Administration to begin human trials last May."

"At the Neuralink presentation in late 2022, Mr. Musk said the company’s devices would eventually allow blind people to see or give someone with a severed spinal cord “full-body functionality.” His claims at the time drew skepticism from experts who argued that science had yet to advance that far."

More discussion: https://news.ycombinator.com/item?id=39183888