I expect it would in fact be hugely expensive to keep the woman's implant going: anything medical is even more expensive that aeronautical stuff. And also, who bears responsibility when the company tanks and the woman has an issue with her implant?

But here's what I think: innovative startups that want to run tests of experimental implants (looking at you Elon) should be legally required to set money aside to support the test subjects' implanted hardware until the end of their natural life or until the implant fails, whichever comes first, if the company tanks.

The money should pay for a skeletal crew of the original engineers working for a government-owned company set up and dedicated solely to that support after the original company disappears, and it should pay for the test subjects' medical expenses related to their implants.