One day these implants are going to be so sophisticated that we may very well evolve to not have bio-hearing at all. I have friends with implants, and one of them regularly just keeps it switched off to focus on writing. I am deeply envious though of course, at present the bit-depth is not very good from what I understand about the tech, and his brain even after 20 years of having the implant isn't good at differentiating between background and foreground sounds, making conversation difficult for him in noisy places. It's great that kids are getting these early so they have a chance to learn how to adapt. I'm excited to see what superpowers they will glean from having powered-brains.