I get what you are saying, some of them however do hold up like this one. The godfather is from 1972, You've probably also have seen The Sound Of Music (1965) and maybe The Wizard Of Oz (1939).

I still need to watch the godfather myself, once started it with a friend but it didn't instantly capture us so we moved on and I never went back to it since. The old movie I plan on watching next year is Vertigo (1958), I've only heard good things about that one.