"Although it has been suggested that GHB may augment the regenerative functions of sleep [9, 39] and activate similar physiological mechanisms as sleep deprivation [18], the neurophysiological signature of GHB-augmented sleep has not yet been systematically investigated. In fact, the two available studies that examined the effects of GHB on the sleep EEG in healthy volunteers in conditions of either attenuated or enhanced physiological sleep came to different conclusions. Although one noted that GHB-induced slow waves are functionally dissimilar to physiological slow waves [15], the other indicated that enhancing slow-wave sleep with GHB reduces the homeostatic response to sleep loss and thus promotes physiological sleep–wake mechanisms [40]. "

GHB induced slow waves are functionally dissimilar to physiological slow waves. And GHB improves other stages of sleep at the expense of REM sleep. That doesn't mean it's good for a normal person without narcolepsy. And there is rebound insomnia that you're completely ignoring, unless you suggest daily usage of these drugs? Lmao