Why is the fragrance "Shalimar" by Guerlain still so popular?

Since I was very small, the fragrance "Shalimar" has continued to be popular. Why is that?|||It's a classic romantic floral scent that has held its appeal for several generations. Personally I think it's too heavy, but a lot of women really like it.|||People like how it smells. What other reason could there be for a perfume to be popular for so long?