I flew American 777 a few weeks ago. It was noticeably narrower than the BA 747 we flew out on. It didn't bother me too much. It was a bit of a faff to try eat and the tables were odd. We still had complimentary wine and food. The IFE was good too.
My mother and sister were annoyed big time at it and after probably the fourth hour of constant whinging I reminded them that the ticket was the cheapest we could find across the Atlantic and between the four of us we had saved £200. Their response was something along the lines of 'ah well, I suppose it's not bad'. Herein lies the problem. To me and many a plane is a plane. I want to get where I'm going as cheap as I can and I suspect there are a LOT of people like me. 10Y isn't the best but I'd take it every time if the price was right. I certainly would not pay a premium for 9Y. I'd rather save the money and get a nice meal on arrival.