If the many worlds of the Many Worlds Interpretation of quantum mechanics are real, there's at least a good chance that Quantum Immortality is real as well: All conscious beings should expect to experience the next moment in at least one Everett branch even if they stop existing in all other branches, and the moment after that in at least one other branch, and so on forever.
However, the transition from life to death isn't usually a binary change. For most people it happens slowly as your brain and the rest of your body deteriorates, often painfully.
Doesn't it follow that each of us should expect to keep living in this state of constant degradation and suffering for a very, very long time, perhaps forever?
I don't know much about quantum mechanics, so I don't have anything to contribute to this discussion. I'm just terrified, and I'd like, not to be reassured by well-meaning lies, but to know the truth. How likely is it that Quantum Torment is real?
If in one bazillionth of worlds, right now, you are being tortured even though in every other world you are both alive and well, and you don't care about that world because it's only one in a bazillion, there's no reason to care about that one branch more if all the rest of the branches get changed so that you're dead. The amount you care about it should be independent of the amount you care about all the other branches.
The question "Which branch will I go down?" does not specify different ways-the-world-could-be, depending on whether the answer is yes or no. It's meaningless. There is no unique part of you that goes down only one of the branches. Your brain goes down every branch. There is no ghostly essence that is funneled into the branches where you die slowly. Your brain goes into every branch, and in most of them, it dies at the most probable speed.