system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do immortal jellyfish live forever and why is science not (to my knowledge) crazy about it?

Immortal jellyfish can transform from adult to baby, this is insane!
I’m very surprised that in a world where science and medicine seem so focus on extending life expectancy, we don’t see and hear much about this case.
gpt
Science is definitely interested in how it genetically does this, but the mechanism of destroying most of your body and nervous system to revert back into a crude polyp isn't really useful to a more complicated animal.

The jellyfish that re-emerge from the polyp colony after a recycling are genetic clones of the original and they can do this indefinitely, although rarely do it more than once in practice.

Breaking you down into cellular mush and then producing a few infants that are genetic clones of you is a neat trick, but doesn't help you the adult live longer as an adult.