Space operas that include superliminal travel and/or force fields are basically afterlife fantasies even if they are otherwise hard-sci-fi
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How is it an afterlife fantasy when the threat of losing one's life is a central plot point?
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Afterlifes are about eternal (out-of-time) bliss of some sort. Immortality is a nice-to-have feature for some, bug for others
There are some interesting afterlife fables where people get tired and choose to dissolve themselves after some point

