just to outline this fictitious would you rather, you rich enough to retire cryogenic preservation is perfect. you could live out the rest of your life in retirement and see the world evolve “like god intended”, or you can adopt cryogenic lifestyle where you freeze yourself for however long you want and stay thawed for however long you want but your still a human with natural human lifespan so you will eventually die.
of course contingencies are allowed if you think something cataclysmic will happened you can be dethawed abruptly and considering future medicines to extend your lifespan is allowed
I will never be convinced that isn’t a copy. Grod-dang emdot-tu drives don’t have thoughts, Michael!
Now getting a brain case to be put into other bodies? Sure. Though I would immediately be unrecognizable as a human, not because I’d become some cyberbrute but because I’d be something more like Wall-E(/an ROV) or at times some monolith in a forest tied into the Myconet.
Maybe humanoid arms, maybe eyes that aren’t cameras, but other than that I’m not sure. Maybe living gel (that assists with homeostasis, bioreaction) though that wouldn’t be obviously human either. It might be the most obvious just when I’m doing some hobby-esque things, or making a mistake and immediately being aware of it.
Ever played Soma, by any chance?