Gosh, if only I had said something like "extra legroom Y" repeatedly in my posts to try and make it clear that I understand that there is a difference between that and premium economy,

Oh wait, I did.

So we're having an argument on which inscrutable alphabet soup letter to use as FT nerd "I know things" code for a cabin, since it has been clear since my original post that I actually understand there is a difference between extra legroom in a cabin and a different cabin? Splendid. I have been properly chastised for using Y+ as a term for "premium economy" instead of W. Thanks for your correction.