This is precisely why I've never been interested in being an organ donor.

I don't remember where specifically I learned this, but I was taught that tissue has to be alive to be useful, so they harvest it when you're almost-dead. Having my last moments be being literally dismembered is not something I wish for my future self.

To some extent, volunteering for any sort of medical study is signing up to be tortured in the hopes that someone down the line might be saved by the research. Most cancer treatments, for instance, are objectively terrible to go through, and when you're testing and developing the protocols you're pumping already sick people full of poisons and hoping for the best.

There's some fraction of people who would prefer to be kept alive as a brain in a jar, depending on the alternatives, but getting to that point is going to require a bunch of people to volunteer to undergo excruciating torture as we learn how to keep the brain alive, how to keep them comfortable, how to keep them conscious, sane and let them interact with the world.