I think about murder. I don't think a murderer should ever be allowed to gain their freedom. Well, I think they should be executed, but if not...life in prison. And if we perfect this, a murderer isn't just robbing someone of a few decades of life they are robbing them of potentially thousands of years.
So would we keep a murderer in prison literally forever?
I am reminded of the twilight zone ep where the guy becomes immortal. Then he murders someone cuz he is eager to experience the electric chair, but he gets life in prison instead. Then he gives up his immortality cuz he doesn't wanna be in prison forever.