I am a big proponent of electronic and online publishing but there is a permanence to a physical book or magazine that cannot be denied. This is not to say that physical books cannot disappear. They can and do, but it takes time and effort or neglect. When something is published online, it only takes one click of the mouse to remove it. That work might remain in Google’s cache for a while but eventually, it will disappear entirely, like the words were never there.