The source provides an extensive overview of The Enduring Legacy of the American Diner, tracing its history from its humble beginnings as late-19th-century horse-drawn lunch wagons to its status as a cultural institution. The episode details the diner's golden age following World War II, characterized by iconic Art Deco designs and their role as roadside havens during the expansion of the highway system. Furthermore, it analyzes the factors contributing to the diner's decline, including increased competition from fast-food chains, rising economic pressures, and shifts in consumer preference toward healthier or trendier dining options. Finally, the source concludes by examining how some diners are adapting to survive through embracing nostalgia, incorporating modern technology, and securing strong community support.

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