In more traditional media, the notion of schedule is very strong. The origin of this is likely bound to the requirements of publishing, whether it be the minimum profitable cycle for printing and delivering magazines or newspapers, the advertising expectations of television broadcast or the audience location expectations of radio broadcast.
Over time, people who consume and produce media come to regard that schedule as a necessary part of the media. They rely upon it, particularly when there is little media to choose from, or the cost of having lots of media means that limited choices must be made.
But is that still true? Or more accurately, does it apply to newer media, particularly digital-based, globally-accessible media such as podcasts?