Quoted from zr11990:Think about if everyone lived to old age how many people would be on this planet.
You would still have accidents, murders, etc. but you're correct, too many people. They might figure out how to regenerate your cells before a transfer happens. I would think those that want to stay around too long would have to agree to move to another planet. Long time before we get there but maybe will happen at some point many decades from now.