Heat death aside, with ‘infinite time’ and probably long before we arrive to affordable interplanetary travel of our squishy forms, we will have found a way to upload ourselves to silicon (or whatever substrate computes the best), where we can do whatever we want on our own little isolated wafers – if that’s what we wanted.

Maybe, but then we need to decide if an upload is you. What matters to me is the continuity of my perception of self. If I spawn a dozen versions of me, I still perceive them as other individuals.

It would involve a transitory step of a direct human computer interface. But tbf, there’s no continuity of perception when you go to sleep and wake up. We have no idea how consciousness works, or whether there really is something as multiple consciousness as opposed to, say, a single thread that traverses all streams consciousness in whatever order