Also, issues with lack of dreaming. It's easy to detect when you start dreaming, but the next steps are hard (stay in a dream state, control the dream). You can

Also, issues with lack of dreaming. It's easy to detect when you start dreaming, but the next steps are hard (stay in a dream state, control the dream). You can end up falling back into deep sleep and suppressing dreaming which will lead to not being rested regardless of how many hours you spend in bed.