The technology is amazing, for sure. But the success of the current CI tech is also a testament to how fantastically adaptable the human brain is.

A normal cochlea has 15-20.000 tonotopically mapped hair cells that turn mechanical movement into electric signals which the brain then turn into meaningful sound. The fact that the brain can also make sense of the electrical signals coming out of just twelve to sixteen little electrical contacts placed along a silicon noodle that gets shoved into the cochlea, and turn this crude signal into into speech and music, is nothing short of mind blowing!