There was a recent scene from Louis C.K.'s new show Louie which highlights another reason why language change really bugs some people: it makes them feel old. At least, that was my reading of the scene combined with my familiarity with C.K.'s other work.
Feeling depressed after dropping his girls off with their mother for a week, Louis has a one-off smoking and drinking bender with his neighbor. He wakes up the next morning extremely hung over, and ventures out for a coffee.
Clearly Louie feels like everything the young, hip people around him are saying is both meaningless and incomprehensible.