I can fall asleep almost anywhere. I routinely fall asleep in the break room at work. Once, I was helping a friend fix his car, and I fell asleep on his garage floor when he went inside to get water.
But in a hot metal tube tearing through the sky, with my neck all kinked? Get out of here, man.
At some point, the seats stopped leaning far back enough so that gravity kept my head in decline. That way I could sleep. Now that they don’t lean back far enough, my head keeps dropping forward, so I constantly am kept in a state or awake.
Hey a neck pillow so you can tilt it to the side.
Neck pillows make it worse because it forces my head further forward.