Originally Posted by
tdracer
The 777 was designed for 9 abreast, provisioned for 10 (similarly the 767 was designed for 7, provisioned for 8 - the difference being very few operators used the 8 abreast).
The 777X is not being provisioned for 11 abreast so there is little chance that will happen, but 10 will be more comfortable.
It's mainly ECS - I've even heard Boeing test pilots comment on how much quieter the Airbus ECS is compared to Boeing and wondered how they did it.
Hopefully the ECS noise is being addressed on the 777X.
I always thought it was because of the GE90's. Kind of bad on Boeing to make such an awesome aircraft but to have the ECS ruin the experience.