Makes you wonder.
If we can grow a brain in a jar (for want of a better term) would we be able to start mapping synaptic pathways?
If so, while that's going on would it not make sense to induce a coma before waking the backup/clone/new being with handpicked memories.
Yes the science right now is creepy, unnerving and ethically questionable but it leaves alot of possibilities open.
Imagine sending a space craft with hundreds of templates ready to go. Turn up at star system and if suitable recreate the crew from scratch. None of that messy mass freezing/awkward relativistic issues/generational ships.
And that's just for starters.