When you look at the big picture, movies endure better. Movies link back to the past. You can watch inventive, and innovative movies such as Citizen Kane and The Wizard of Oz and Casablanca from more than 70 years ago and they still feel fresh.
Some of the “classic” TV shows of the ’70s have not aged well. Compare that to “classic” television such as, say, I Love Lucy, currently broadcast daily on Joy TV. That was a show that had its share of classic bits, no question. But you have to slog through hours of obnoxious behaviour and shameless mugging to find them. (By the way, has anyone ever noticed what an awful person the character of Lucy Ricardo is? What a whining, wheedling, needy, aggressive, shameless self-promoter! How did Ricky put up with her?)