How Well do Category Romances Age?

With the publication of Harlequin’s Famous Firsts Collection, I recently read two romances from the 1980s, Debbie Macomber’s The Matchmakers and Anne Stuart’s Tangled Lies. Though Tangled Lies has a suspense plot, it is less prominent, and it seems fair to consider both romances essentially contemporaries, albeit very different ones in style. After finishing both, I found myself pondering whether they seemed more timeless or dated to me.