Microfilm is for things like long term document archival, like newspaper archives. When I was a kid I could go to the library, look up a paper in the index, and pull the microfilm reels for the year. There were microfilm machines that you could wind up on it for viewing. Last time I was at the library, there weren't any machines, the archives weren't there, and the online archives only went back a few years. Welcome to the digital age. "We Won't Remember It For You" (A take on Philip K. Dick's, "We Will Remember It For You, Wholesale")