Since then, with the help of ever-cheaper clothes, more and more Americans have sought to follow Carrie’s lead. The closet has transformed both spatially and spiritually, from cramped afterthought to personal sanctuary. At the very high end, closets can span multiple rooms and comprise a near-limitless set of amenities—vanities, desks, wet bars. They can even bear an uncanny resemblance to boutiques. As shopping continues to shift online, the ultimate luxury might be building a store of your ow