For example, while the 1990s sitcoms dated due to the rapidly-changing nature of what's considered "hip".
Some jokes fall victim to this, when a history lesson is essentially required to explain the joke to folks who weren't around at the time the joke was funny.
He was accused of messing up live segments and took a jab at Matt Lauer during a segment on Olympic rowers.
When talking about after race traditions that includes throwing a teammate in the water, Matt Lauer jokingly said “The tradition here in New York is you throw her in the Hudson River.” To which Al Roker quickly responded “Which is different than our tradition, which is you throw one of us under the bus, but that’s another story.” The comment was considered a direct shot at Matt Lauer.
While a joke about a president who is long remembered may have many years of life, a joke about a news story that isn't well remembered 20 years later except by the people who were alive at the time or paying attention, or based on a then-popular but now long-gone ad campaign, wouldn't - inverting Don't Explain the Joke because the explanation is necessary.
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.
, for when long-running series make blatant (and sometimes forced) references to modern culture in an attempt to seem up-to-date or to look more "hip", often resulting in one of these.
Sometimes, especially when the viewer has spent too long on This Very Wiki, the very tropes in use may be recognisably of an era — such as the '90s Anti-Hero.However it was reported that “Today” show anchor Matt Lauer did not get along with Ann Curry.TMZ stated that one of the conditions that Matt Lauer insisted on during his contract negotiations was that Ann Curry be terminated.Note that a work being a product of its time doesn't necessarily mean it isn't relevant or entertaining to modern audiences, even notwithstanding the kitsch or nostalgia factor (as many of the examples below will demonstrate).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.