As time marches on, a movie's popularity, critical esteem, etc., typically do not remain static (assuming they are remembered at all).

Often, movies are loved when they come out and rightly are forgotten or loved less as time passes. Maybe the effects don't hold up, maybe changing times render the movie obsolete.

But sometimes, it is possible to feel, movies' reputations *wrongly* decay. Or later on people simply forget how good they were.