The airline customer must bring in a less efficient aircraft in place of the 787 being fixed over-night. That means a whole tank of fuel operating at a loss on most routes flown by its replacement aircraft. Boeing is expending immense resources making the 787 as compliant as the 99% glitch free 777-300ER. The glitch list is shortening at a rapid rate and now airlines don't want to park the 787 for a fix. The 787 is saving airlines operating bottom line as it is making profits every hour it flies. These enthusiastic customers would like Boeing's team of Glitch fixers to go away for another day, because it would mean the 787 isn't flying that day during glitch fixing time.
The world is thirsty for this airplane now! This basis of thinking was found in an article today recounting this same premise. Don't Ground My 787 during my watch, cry comes from customers lip because it is turning around airlines at the same pace they can launch the aircraft.