Yes there are a lot of dark sides to this but I am still somewhat hopeful for people whose body have betrayed them.
Unfortunately the unmentioned horror of this technology as it currently stands is similar to "Flowers for algernon". The brain is extremely territorial and doesn't like weird metallic stuff stuck in it. In response, I believe the astrocytes build encapsulating scar tissue around the probes that eventually deafen them. I have been following this tech since the early stages in the late 90's and no one seems to have solved that. Truly bitter experience for epilepsy and near terminally depressed patients who have been given some semblance of normallacy only to have it slip away.
A currently insanely expensive probe design has something like a magnet on a mems platform so a less reactive and normally insulating material can be used to "sense" electrical impulses. Sadly it has something brutal like a sub 5% production yield and can be damaged almost anywhere along the journey from a fabrication laboratory to a operating room.
Boeing is the poster child of what killed the USA.
Boeing went from an engineer centric company and was poisoned by a "reverse-merger" that put people who already killed one manufacturer in charge. These parasites proceeded to stick to the same playbook that drove them into the ground plus double downed on their greed. I added up all the stock buybacks which looks like legal embezzlement and it was more then the research and development costs of the 777 and the 787 combined. I didn't bother with adjusting for inflation as the buybacks are spread over decades, so the true cost is definitely worse.