Originally Posted by
Arbeysix
Well that all depends which routes you flying given that many are exclusively or predominantly served by the 350/330. BNE for example. That will only increase over time as the 777 forms a progressively smaller proportion of the fleet.
CX ordered tons of 777X to replace 777-300ER. A350 is served more to replace current mid-longhaul A330 routes (SYD/MEL/BNE)
Anyway, the default Boeing seat configuration for 777X is 3-4-3, given the marginally wider space.