I'm being forced to cheat on DL next week flying to PVG. The United Polaris SFO-PVG flight (and its return mate) is a "pajamas" flight. I'll try it out as a novelty. I typically travel long distance in a hoodie, mainly so I can sleep in the t-shirt underneath. So, we'll see. I expect still to view pajamas as a novelty/luxury rather than a necessity.