Soooooooo...here's a thought concerning trans humanism.
When your brain is removed from your body, you have no sensory input whatsoever.
No sight, hearing, touch, smell, taste or balance.
What if your transplant goes horribly wrong and your new body cannot be successfully connected to your brain?
What if your brain is removed by a totalitarian state and kept in a jar for a sentence period because you broke the law? What if you were forgotten about?
If hell does not exist it will.