Auto instance layer or more option for simplify

Proposal to add auto instance layer. Now layer can be hide from viewport, hide from render. If add one more option to auto convert objects from other layer to instances, its increase performance?

Example, on first layer work was done and i start make other meshes on second layer, but i need see what i make in first layer, just see, not edit. For it i enable auto instance layer and see objects from first layer like instances. Its increase performance?

If needed to edit a mesh from an in active layer, select instance from other layer and convert to active layer. The layer on which the object was located becomes active, and objects from other layers are converted to instances.

Or add option to "simplify" to work only on non active layer.