I'll tell what I remembered from some interviews he did in Brazil: He research this tech for years and did some implants 20 years ago, now he and others believes that a non-invasive solution is the goal to cure paralyzed patients. In 2016 world cup he showed a paralyzed guy using a exoskeleton to kick a ball. The invasive chip not only have no real benefit but also has a huge chance of failure because of how the brain moves in the skull. He's very critical with neuralink and calls it bad sci-fi.