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.
Business class lie flat seat for long haul flights. Tickets are insanely expensive… fortunately I have a lot of air miles from company travel. Once you try it there’s no going back.