There is some truth to the notion that Women's Fiction is ephemeral - especially "contemporary" women's fiction. (I would say though that applies to contemporary fiction in general - things just don't always age well when they are grounded in a certain time period.) Chick lit in particular gets hit hard in this way, because it revolves so much around fashion, and trends, and name-dropping, etc.
Historical women's fiction however, tends to age nicely. Case in point - the recent Dusty Book review on Shelf Renewal of Jacqueline Briskin's The Naked Heart.
In The Naked Heart, bestselling author Briskin crafts a story of
war, revenge, friendship, and love. Gilberte and Anne are best friends
torn apart by the Nazis in World War I. Aristocratic Gilberte is
uncovered as a collaborator while Anne gets to run off into the sunset
with Gilberte’s cousin. Years later they meet again, and Gilberte is
hell-bent on revenge. Secrets from the past will get you every time…
You can read the full mini-review here, at Shelf Renewal.