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Occasionally, an editor will add examples from pop culture to an article without consideration for the policy of due and undue weight. It's an issue usually found in articles with a broad scope, such as music genres or art movements. At its worst, the article turns into a rambling, drawn-out mess of TL;DR and coatracks.
One real example of this issue can be found in this earlier revision of Concept album, which ran through an exhaustive, indiscriminate list of albums and their themes. Most readers are not interested in a complete and comprehensive history of every concept album ever recorded, only the notable ones – and explaining why they were notable is vital for establishing encyclopedic relevance.
In short, examples should be limited to the historically meaningful. If you can't find sources that directly support phrases like "the earliest", "prominent figure", "highly influential", or "inspired a new wave" to whatever/whomever you're referencing, then they're probably not important enough to mention in the first place.