In some places where I hunt pigs, a scope is a necessity due to much of the shooting needing to be done in very low sometimes non existant light. If I didn't have a scoped double I would have to take a scoped bolt gun.
I would much rather use a double, so I have two which are scoped, and which work great in a variety of hunting conditions including very low light.
Both are fitted with QD mounts so that I can always easily remove the scope and enjoy the better handling and greater satisfaction of using the open sights.
Open sights are my preferred system on a double, but sadly in extreme low light conditions they are pretty well useless.