Your ships will also have to deal with hazards that increase as quests grow more complex: sirens, harpies, sharks, dragons, waterspouts and wizards that cast fireballs.
Luddite harpies and other critics of the B-2 are pouncing upon grossly exaggerated and misleading information about such technical "problems" to insist that no more than the presently budgeted 15 B-2s be built.