Obsolete body parts

While his two-implant system is still working, he doesn’t know how long that will be the case. “As long as nothing goes wrong, I’m fine,” he says. “But if something does go wrong with it, well, I’m screwed. Because there’s no way of getting it fixed.” -Their Bionic Eyes Are Now Obsolete and Unsupported - IEEE Spectrum

I never thought about something like this happening. I’m more familiar with the distopian fantasy featured in Repo! The Genetic Opera¹.