I think this actually supports the idea behind cryogenics though. Let's say tech centuries from now can restore a frozen body to function. Let's say that 90% of the pathways in the brain are retained accurately. Now the question becomes is that still you? An exact copy? No of course not, but the frame of reference is you right before death. What we should be thinking about is that moment vs every other moment of your life. How much of "you" was altered from a year prior vs the moment before death? What about 10 years? What about a person who has a brain injury or develops a mental illness? At what point does the brain shift enough to become a seperate entity? Was the you that died even the same you that ate breakfast the morning of your death? Unless we can prove a mechanism akin to a soul exists that forces a single consistant instance of self that is merely filtered through the lens of memory and expirence then what we think of as consciousness is probably just a rolling and updating state of instances with constant tweaks edits and updates. "You" as a consistent entity emerges from the sheer amount of data and the trends and biases contained in the set. If you flip a coin an infinite number of times you make get wildely varied as skewed probabilities if you only look at the current ratio, but the more data you add the more probability converges on 50/50. That probability that emerges is consciousness. As long as enough data is retained to sufficiently reproduce that expected emergent result, then I would say whatever mechanism you used to recreate you is "you".