In this articleJWNKSSMSignage of Macy's, Kohl's and Nordstrom retail stores.Getty ImagesDepartment stores are aging — and so are their customers.For over a century, the stores won over multiple generations with a promise to sell shoppers a wide variety of everything. For many Millennial and Gen Z consumers, that hasn't been enough — especially as they discover items on social media and specialty retailers, big-box stores and online players steal away sales.Department stores like Macy's, Kohl's and Nordstrom ...