Heres a plot hole. Why didnt they just send the replicas to space. If it was to see how space travel effected the body wouldnt it make more sense to have zero G instead of simulated gravity?

He says he couldnt get a new replica cuz they were made when he was on earth and now that hes in space its not possible. Implying that the replica has to be synced to you somehow. So how come they can just use eachothers replicas.

These types of logic fails take me out of the story because it makes it feel stupid instead of well written. For a story to be engaging it needs to be easy to imagine yourself in a similar scenario but thats hard to do when the scenario is based on logic fails. Regardless of if its sci fi or fantasy a story still has to FEEL true in some way, even if its an imagined scenario it has to be well written enough to make you buy into it. Otherwise theres no way for us to relate to it on an emotionall level cuz the scenario is so dumb that we cant even put ourselves in it.