As one cryonicist puts it: "We didn’t evolve to be frozen."
"It’s pretty well accepted that at the point at which the usual human
being gets pronounced dead, all their cells are alive. It’s a very
eerie question: if all their cells are alive, what is death?" says
Becker. Besides, if all the patient’s cells are alive, why can’t the
patient recover and walk out of the hospital?"
Here is the full article, which covers recent advances in cryonics.
Addendum: Or try YouTube on related issues, hat tip to Robin Hanson. Maybe that is the right way to do philosophy, namely by cartoon. Definitely recommended. It also presents a solution to the current subprime crisis.