This was the main piece I did for music A level. And I suspect my eventual E grade was due in some part to my complete inability to listen to it without falling asleep. We would sit in class with scores open in front of us and my head would gradually dip lower and lower until I was snoring into the manuscript. This isn't just anti-classical bias. I can stay awake through other pieces, just not Brahms 4.
It's handy sometimes. But it's only good for sleeping, there's none of the reassuring comfort of permanentbedtime.