&gt;facing my copy, there wouldn&#x27;t be a reason to feel immortal - I would die anyway, and the other guy would continue to live. so immortality for me means preserving my own instance of me, anything else is just not there. it seems to me this would be much harder to implement compared to creating a copy, so this would be available much later, and who knows with what consequences.<p>Do it while you&#x27;re unconscious. You go to sleep, then wake up in a different body. No existential crises needed.