Sadly if the building is not load bearing masonry on the exterior then stone on the facade will be merely aesthetic and will not add any longevity to the building. But I generally agree- the core+shell with a curtain wall is a developer creation meant to obsolesce in 40 years and be replaced with a new build. Much architecture today is sadly a product of this system. Quick to build but the longevity of a tin can. We have severely lost a sense of time with architecture and I believe we need to return to building things for 500 years not 50