@jens what I mean is, it's not that this night I slept less than normal. it's that this night I slept much more than normal, which for me is a big win.
(and it also means I can do things in the morning, because I'm actually rested. since normally I only sleep a few hours, I wake up tired and can't get up. the timing of waking up doesn't change, only how functional I am. it is impossible for me to wake up later than 6~7ish, no matter if I slept at 4 or at 23.)