We see them go into stasis for "short" episode-specific journeys. Why do they go into stasis for these short journeys, but not for the overall journey back to Earth? Out-universe it's because there wouldn't be a show, but what about in-universe? Why hang around the ship getting on each other's nerves, getting attacked by slime-robots from the past, and watching your lifespan tick away knowing you're going to die of old age before you make a dent in the journey? Since Lister discovered Kochanski is still out there (BTE 3) I think that's a fix now. Lister can't go into stasis (for long) because he needs to find Kochanski, and Kryten wants to support him. It's drilled into us that Cat is selfish, so I don't see what's in it for him. I'm not sure how stasis works for Rimmer. There have been discussions about switching him off, but he's been scared they won't turn him back on. It's unclear if Rimmer went into stasis in Krysis, or got switched off, or stayed on by himself. Rimmer is apparently immortal so wouldn't need stasis in the way Lister and Cat would, but even then he might not want to wait out a three million year journey. But what about before BTE 3, when Lister thought Kochanski was dead? Did he hang around on the ship because he was hoping to find another Kochanski from an alternate-alternate-dimension? When Kochanski was onboard I assume he was excited to be around her, thinking he might win her back. What about before Ouroboros, when Kochanski really was dead? Maybe the thought of going into stasis for three million years back to Earth is just too terrifying, like death. But in Future Echoes, Lister and the Cat were both quite willing to do it. They just didn't . . . for no apparent reason. Holly reached light speed early and they started seeing Future Echoes, so they hung around to watch them instead of going to stasis as planned. Although we can assume they went into stasis for several thousand years off-camera, because Lister says it's going to take four thousand years to turn around, and in Better Than Life Holly says they've turned around. So why did they bother coming out.