Fine tuning screen and click “AutoSense OS” on the green background to your left. The MotionSensor slider will then appear in the center of the screen.
Thirty years is definitely a long time, making rehabilitation harder, but not impossible.
I don’t believe the “dead nerve” statement, because there was much cutting of corners and oversimplification in communication with patients, especially in the past.
In reality, the “dead” part was the cochlea, not the nerve (it was my case).
To summarize, a cochlear implant evaluation must be performed to ensure the nerve is not damaged.
See the Facebook group here, there is many SSD people implanted after long-lasting deafness: