Originally Posted by
clubman
Because the 3 class 777 has just one very large J section, so it has what people like to call here the dormitory effect.
Do you mean the 4 class? The 3 class 777 has 2 sections, and the aft section is even smaller than the UD. The fore section is about the same size as the UD, and better than the section behind it as there is no disturbance from WT+ and if door 1 is used, you'll disembark first.