Yes, I agree about Y cabin. Starting back with 747-400s, then 777s, A380s, 787s, and A350s, now airlines have aircraft and route easily fly longer than 12 hrs. But I do not think airlines has looked into Y cabin regarding people stuck in the space for that long. I understand that I should appreciate those fare sales which allow me to visit far places for less than US$1000 round trip. But when passengers are stuck in aircraft for 12 hours plus, airlines should not design seats and space of Y cabin same as 737s doing three hours flight.

Even here at FlyerTalk, discussion is pretty much about new seats in Business and First. Hardly talk about Y seats on those long international flights lasting more than 12 hrs.