It already is: https://spectrum.ieee.org/bionic-eye-obsolete

I'm pretty sure whoever receives such device to help them move/see/hear or whatever again, would much more prefer having an "unsupported" device (however that may manifest itself), to not having it at all.

Besides, I don't think devices of this nature would be subjected to the same market forces as smartphones or other devices, so cycles would be much longer and obsolescence wouldn't be a problem.

Also, this is not the first time people would have electronics implanted into them for medical reasons.