In 1995 the answer was nine when asked how many planets our solar system contained. Twenty years later, we have a different answer. Similarly, 10 years ago we were told that the client is king. Today, I guess you hear that the content is.
Operating and living in the same space, the context and knowledge have tremendously changed. The art to communicate, plead for or against a cause, as well as support or recommend a position has been taking in different techniques and canvas.