Not long ago, technology was beginning to allow the blind to see.  Beware the need for maintenance and software support:

These three patients, and more than 350 other blind people around the world with Second Sight’s implants in their eyes, find themselves in a world in which the technology that transformed their lives is just another obsolete gadget. One technical hiccup, one broken wire, and they lose their artificial vision, possibly forever. To add injury to insult: A defunct Argus system in the eye could cause medical complications or interfere with procedures such as MRI scans, and it could be painful or expensive to remove.

On its face, this is more a market failure than a technological one.  (What is preventing the market from making such miracles sustainable?)  Either way, however, it does remind us not to be too readily trusting in technology (whether implants or, say, vaccines) that must be maintained in an ongoing way.  It also reminds us how easily the ground can fall away beneath us.  Disruptions from experiments in big government, for example, become absolutely profound when one needs the structures of society even in order to see.