The article does however make one concession which is that while art is duty free, other items such as antiques (e.g. a lamp or desk) are not unless they are ov

The article does however make one concession which is that while art is duty free, other items such as antiques (e.g. a lamp or desk) are not unless they are over 100 years old. So there is some possible use still. But largely it's a status symbol for the high security storage location.