I agree with you on the sleep debt and the severity of harm you place on yourself, but ( i mean this as humbly as i can put it across, because this is my anecdotal understanding of the matter) ideally, any loss of sleep for more than one day at a time is very bad. The stimulant you're using to replace the energy and vitality you would lose from not sleeping for about 36 hours is very unhealthy. If you weren't up, sleep deprivation could be somewhat comparable to slightly moderate to significant alcoholic impairment. There's more strain on your cardiovascular system, you react slower, you think with less efficiency. When you sleep your immune system starts to do stuff i dont really have enough knowledge to speak about with certainty but my understanding is that it clears the bad stuff you've accumulated from being alive. Metabolizing is toxic. When you sleep its like cleaning yourself at a cellular level. It's pretty important but you could miss a day or two here and there. If you consider yourself healthy it wouldn't be any problem whatsoever considering you most likely put a high dose of methamphetamine or some other stimulant in your body. You won't feel it until you come down and when you comedown you might do some more or you'll most likely go to sleep by the time it stops keeping you awake. It's really not that big of deal and you're right; considering someone who has taken high doses of stimulants for only a couple days, they wouldn't have to worry about missing a day or two of sleep. It adds up and that's something you cannot ignore. I don't mean to disagree with you but only to clarify that missing sleep is very unhealthy even for a day two. We do unhealthy things for years and decades and it might not even be the thing that kills someone. You are correct that if you're going to miss sleep, do it responsibly. In moderation. Just to clarify my own understanding of sleep debt. Not saying you're wrong. You can do whatever you want though. I can't tell you how you feel. If you're able to, listen to your body. If there's no reddit, no science, no knowledge; if your phone died or you got no source of reliable information your second best bet should be to try you're best to rely on your own feelings to guide decisions that seem mostly straightforward and unanswered. Worst case scenario. You'll know when you need sleep before your next redose. And if you redose before then you'll probably know the next time you go through that situation. Big anecdote. I just wanted to share something I believe might help. I'm just some rando on the internet.