This is an interesting question, but it seems to be in a different realm. For example, it could be reformulated as follows: is this 50-year torture option that bad if it is parceled into 1 second chunks and any memory of each one is erased immediately, and it has no lasting side effects.

For the purpose of this discussion, I assume that it is 50 dismal years with all the memories associated and accumulated all the way through and thereafter. In that sense it is qualitatively in a different category than a dust speck. This might not be yours (or EY's) interpretation.