I think her editorial work is brilliant, regardless of her age. Age is a number and you can't say someones thinks/acts/should-do-sth just looking at that number. One girl could be really different from another, etc. Hope it makes sense.
Then about Hermes or any other clothes she's modeling, I think she's not selling the clothes that much older women are going to wear, she's selling the image of a brand/label and obviously when I see her editorial qualities I think she's able to do that, brilliantly. Again, this is my very own point...