Of course I agree we won’t attain any technology that is not possible, tautologically. And I have more than enough remaining uncertainty about what the mind is or what an identity entails that if ASI told me an upload wouldn’t be me, I wouldn’t really have a rebuttal. But the body and brain are an arrangement of atoms, and healthy bodies correspond to arrangements of atoms that are physically constructable. I find it hard to imagine what fundamental limitation could prevent the rearrangement of old-failing-body atoms into young-healthy-body atoms. If it’s a practical limitation of repair complexity, then something like a whole-body-transplant seems like it could bypass the entire question.
Of course I agree we won’t attain any technology that is not possible, tautologically. And I have more than enough remaining uncertainty about what the mind is or what an identity entails that if ASI told me an upload wouldn’t be me, I wouldn’t really have a rebuttal. But the body and brain are an arrangement of atoms, and healthy bodies correspond to arrangements of atoms that are physically constructable. I find it hard to imagine what fundamental limitation could prevent the rearrangement of old-failing-body atoms into young-healthy-body atoms. If it’s a practical limitation of repair complexity, then something like a whole-body-transplant seems like it could bypass the entire question.