I 98.7% (close to 100% is my point) never wake up in REM anymore which is the "feel tired all day" state you would feel. I get thru at least one or two full sleep cycles relative to my ability to be percise-ish. I didn't know it was REM that screwed me. I thought, it was an, "at least 4 hours or you are screwed" type rule of thumb. The key is to get thru the full 90 minute (avg) 5 stage sleep cycle and then either wake up or commit to 2 cycles, etc. One or two still has you tired compared to a refreshing 4-5 (low end) or higher. But I was amazed that waking up in REM in the 5th cycle hurts worse sometimes, that getting only 90 cycle or two, egress before next round and surprisingly refresh I can get thru a day. I'm sure a non-layman in the field could turn my Dr. Suess version of an explanation to a more accurate and nuanced version. Tried others, more complex, this is perfect for my needs never looked back:
I could see others conclude, yes, that is damage or will be from drugs. Which I disagree, but it could then be argued, that of course due to damage affecting my thinking and reasons to think otherwise, not true either. But I don't need to be right, just need to say I know that is one valid angle.
Psychological, your neuro pathways are getting a strong message to build one of the strongest connections between cannabis and addy. That can be reversed or reeducated. I think our brains still need majorly heavy hours of liberal arts, day dreaming, reading books per day or per week + sleep. I use a sleep calculator too, changed my life way more than I assumed.
Cannabis: Between 6AM - 10PM are Sativas/Hybrids only (aka, a head buzz). Indicas/Hybrids after 10PM - 5AM (aka, a body buzz). Adderall: 80-120mg per day over 3 dosings 40mg on wake, 40mg 2pm, and 40mg at 5-7pm. Never drink, just not my thing. I use to shroom or roll with friends a handful of times per year (spring cleaning for the mind). We all stopped, but then I got depression, so I have been sorting out a shroom (or xtc or lsd or k or whatever seems right) to replace the 6 month on anti-depressants that I forced myself and doctor off of. Harsher on my system than any drug I've ever taken. That and Adderall would/will have worst long term effects to organs I assume and I've tried almost all common and some not-so except heroin and crack nor would I smoke meth -- those felt and sounded like alice and the rabbit hole with no return. Never had a problem quitting any drug on a moments notice, except for the weed. I know, odd, but that is the only one I might never give up. It calms the anger and frustrations that builds at myself internally suffering due to my LD (learning disabilities) over the day.
To underscore my point on how harsh the anti-depressants for a few months were. 10 years or so back, I got MRSA from a dirty beach blanket in an in-grow calf leg hair (or only thing I can assume). I ended up at emergency room. They had to give "Drug of Last Resort" Vancomycin https://en.wikipedia.org/wiki/Drug_of_last_resort which 100% wiped out my microbiomes and then some. Still, with no gut bacteria no food nor illicit drug had even close to harshest ever those effects of that antidepressant. Never had skin problems, major ones. Never had a day every 45 days or so randomly where I was more depressed than ever while properly taking it.
https://sleepcalculator.com/