What term describes films or products that maintain popularity year after year?

The term that accurately describes films or products that maintain popularity year after year is "Evergreens." This terminology is used to signify items that have a timeless appeal and consistent demand regardless of changing trends and seasons. Evergreens often refer to movies, songs, or products that continue to attract audiences long after their initial release, resonating across different generations.

This concept contrasts with "Trends," which are more short-lived, reflecting a current phase of popularity that can quickly fade. "Fads" similarly denote fleeting interests that capture attention for a brief period before disappearing. "Classics" might seem similarly appealing, as it also implies enduring quality; however, it often relates to specific products that are regarded as exemplary or influential in their field, rather than a general term for ongoing popularity.

Thus, "Evergreens" is the best choice as it encapsulates the essence of sustained appeal over time without the limitations associated with fleeting trends or specific classifications of quality that might not reflect general longevity.