And yet Emirates already operate the 10-across 777. Many more of them, in fact, than the A380 (as do the other two of the ME3). So it clearly works for them.
Indeed, and they're just as cramped as everyone else's 10-across 777. The A380 also works for them too. It's a big contrast.
About this quality vs. price thing: with the level of competition in the market long haul flights are remarkably good value for money, and getting cheaper. Once the price hits a certain low level it'll stop being a purchasing factor, and other things (schedule, ride comfort, in flight service) will become more of a consideration. Good ride comfort is harder to offer in an aircraft that makes no economic sense with 9 across, and is unpleasant at 10 across.