The problem is that you only know after say 5-30 years what has historical value.
That was no problem with film, books, newspapers, printed photographs (negs) etc.
In our digital era it is so much easier to re-use media and destroy content.
Footage shot on tape or film, you just store somewhere. (although you COULD re-use tape off course)
Nowadays if a server or disk-array is full, the trend is to only back-up some stuff and simply delete the rest...
I'm pretty sure that within 10 years from now, we all come to the conclusion that there is a huge historical gap.
