In the layer manager there is a method in the right-click menu to “Duplicate layer and objects”. However, this copies all the objects on that layer. I think that it would be helpful if there was an option to duplicate layers, but copy only selected objects.
It would come in handy when creating new options from parts of models, which have nested layers and objects inherit properties from these layers. I think that the only way to do it at the moment is to copy all of them and delete parts manually in the copy and the original.