Most likely the benefits of adding inaudible content are inaudible.
It is known that sharp filters to remove out of band noise can effect the "in band" sound, however, that seems to be the only convincing argument for greater bandwidth (well beyond what you can hear) in audio reproduction.
It is known that sharp filters to remove out of band noise can effect the "in band" sound, however, that seems to be the only convincing argument for greater bandwidth (well beyond what you can hear) in audio reproduction.