so, say that nothing "out there" happened in Act 7, just all the plot loops being closed, and the cherubs will eventually be born on Earth. (my personal interpretation is that the kids would ensure LE never exists, but no one else is saying that). my question is why would the kids abandon earth, letting it become a wasteland? i know the star it orbits is dying, but they've moved a planet once before... its just very upsetting to think about...

Maybe they aren’t as immortal as we think.