Briana offers a good exposition of the fact that classics are not ignored or pushed aside because their themes appeal to “old” people.
I believe this happens because reading classic literature is often work; work that requires we labor with more formal, complex expressions of the English language. Most people, including many teachers, don’t want to be bothered to that degree. Many are also ignorantly dismissing timeless values for what is more “relevant”.
When I am reading a book and need a dictionary, or am compelled to think of transcendent ideas, it is then that I know I am really reading!