Having been up for over 24 hours, I finally went to bed and actually managed to fall asleep.
For two hours.
Then I woke up and couldn't go back to sleep.
I lay in bed in the dark for awhile to maybe hint to my brain that I was still bone-shatteringly exhausted and maybe I should remain unconscious until I was properly rested, but my brain advised me that this was unnecessary— it's the middle of the afternoon (despite the clock insisting it was 1 in the morning), and a two-hour nap should be more than sufficient to keep me coherent until bedtime despite the fact that "bedtime" only exists hypothetically.
So I've been up since then. And my serious post has been languishing in drafts still half-written waiting for me to be coherent enough to finish it.