Quantum immortality
Physicist Sean M. Carroll, though also in favor of the many-worlds interpretation, states about quantum suicide that neither experiences nor rewards should be thought of as being shared between future versions of oneself, because these future versions become distinct persons when the world splits. He then states that a person cannot pick out some future versions of oneself as really being oneself and not the others. He concludes that quantum suicide kills some of these future selves, which is a bad thing the same as if there were no other worlds.