Caveat emptor. Whenever the discussion of lucid dreams comes up on HN, invariably there are reports of people who did it regularly but had to stop because apparently doing it a lot makes the dream world and reality begin to blend too much and you end up tired all the time and not sleeping well.
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.
Almost like claimed “control” is no control at all and yet more people are convinced of their power over life while displaying their helplessness and lack of wisdom.
I guess that’s science now: learn one small thing and project it over everything.
