The other day I finally rewatched Ordinary People (1980) which I had always thought so very good. I was blown away. It is such a good portrayal of the incredible damage done by trying hard to go past a terrible incident/loss without really dealing with it thoroughly.
This brought to mind an idea which is to do this thread. Tell us about a good older movie you watched recently and tell us why we should view it again. It can be from any genre.