“As a critic — and as a fan — Rock doesn’t seem to fill me anymore. I admit complicity in my own alienation. Events had denied all of us the social stability which Rock requires.”
Richard Goldstein, in 1969, demonstrating how weariness among rock critics set in early (was, indeed, I might even argue, built right into the profession).
RockCritics.com 
I think it was film critic Pauline Kael who talked about the importance of self-renewal, and of not depending for all of one’s stimulation on the field to which one was paying professional attention, the importance of responding to other art forms and to life experience.