Yea stimulants probably don't really offer much of a performance boost to an already healthy brain - but if your brain is already defective from fatigue they ca

Yea stimulants probably don't really offer much of a performance boost to an already healthy brain - but if your brain is already defective from fatigue they can keep you going beyond what's humanly possible. The Germans didn't ply their soldiers with speed in WWII because it improved their reflexes or their tactics - they did it so a soldier could fight when his brain would otherwise be mush from not sleeping in days. Anyone can benefit from just having more usable hours in a day.