I literally say this all the time. Electrical penetrations are a great example. You have guys which run all electrical through penetrations in the soundproof shell which are then sealed up. But then you have other guys who move heaven and Earth to avoid any penetrations at all costs. In the end will it really make a difference? Probably not...or the difference will be so small as to be imperceptible....but whats done is done and how much will it make a difference?...