[shatnersbassoon]

If he can't get cars to drive around a city autonomously, who is going to let him drive electrodes around their brain using automation?

Brain implant surgery is incredibly invasive and risky even with brain surgeons.

[visarga]

They start with animal tests, then impaired people and finally public at large. It's stupid to get implanted with a work-in-progress device yet, except if your life quality requires it.