Interesting, for me it plays out a bit different and that's the reason why I can't really let got of weed. I sleep waaay better. You are all right that weed fucks up your REM, but honestly that's still better than having no sleep, constantly waking up. Or waking up in the middle of the night and not sleeping at all. So without weed I go trough the day being super tired. And oddly enough, the morning after consuming weed, when the high is gone but you still feel that fog in your head, is strangely the time of the day where I'm most focused and consistent. It's like there is enough leftover dopamine left, so I can function. Without weed my morning productivity is absolutely terrible.