The Principle of Relative Constancy and the Adoption rate theory are closely tied together. The core principle of relative constancy is based upon a simple question.” What happens to older media, do people just keep adding new entertainment media, or do they adjust by dropping one form in favor of another? These two theories in play in favor to one another one seems to not be able to work without the other. A new media of technology is introduced in order for adoption to happen and people spend money in order to make it happen.