If the work's severe datedness also makes it inaccessible to modern audiences, then you have Values Dissonance.
However, this trope can overlap with Values Dissonance if an intellectual fashion was very short-lived.
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To provide a concrete example, let's say you're changing channels and come upon a show involving two men sitting at a bar in some tropical country.
As years pass, the number of people who get the joke or remember the reference shrinks until the joke becomes an artifact of the generation.
Historians studying an era, however, read the joke and get a good laugh out of it still and these jokes can liven up an otherwise dullish history lesson, or amuse a group of people knowledgeable of the era, or catch your grandparent off guard: "I haven't heard that joke for years!
One in a military-looking uniform with a hammer-and-sickle badge on the side is whispering in heavily accented English about his worries that the Berlin Wall may not last.
The other man, sporting a glorious mullet, clips his absolutely gigantic cell phone to his belt before putting his hand on the other man's shoulder reassuringly.