Understanding channel permanence

Even the things that live in obscurity can be reasonably permanent. The amount of storage that is used to house junk email must be shocking. The digital era has created a degree of permanence for some things. An email that was sent years ago can be retrieved in seconds. Students in college classes right now are watching advertisements and videos from around the 1970’s forward. Advertisements from iconic political campaigns seem to live on and are still being consumed. Most political advertisements from state and local elections do not enough that degree of permanence.