It would be easier to record than upload. Since upload requires at least a decode steps. Given the fleeting nature of existence how does one confirm the decoding? This also requires we create a simulated brain, which seems more difficult and resource intensive than forming a new biological brain remotely connected to your nervous system inputs.

Recording all inputs in real time and play them back across a blank nervous system will create an active copy. The inputs can be saved so they can be played back later in case of clone failure. As long as the inputs are record until the moment of death, the copy will be you minus the death so you wouldn’t be aware you’re a copy. Attach it to fresh body and off you go.

Failure mode would take your literal lifetime to reform your consciousness but what’s a couple decades to an immortal.

We already have the program to create new brains. It’s in our DNA. A true senior developer knows better than to try and replicate black box code that’s been executing fine. We don’t even understand consciousness enough to pretend we’re going to add new features so why waste the effort creating a parallel system of a black box.

Scheduled reboots of a black box system is common practice. Why pretend we’re capable of skipping steps.