RR is starting to look at the future of air transport propulsion, and it has everything on the table right now, including increasing maintenance to reduce fuel burn, which is as close to heresy as you can find in commercial aviation.
Time on wing has been king for a very long time. It's one of the things that allowed early jet liners to beat their piston, and to a lesser degree turboprop (gearbox maintenance), competitors: that the could stay in service, and flying for a very long time.
It's an interesting testament to the changes wrought by the increasing oil price spike, and it convinces me that open-rotor propulsion will make it to commercial use this time around.
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