Everyone is in a hurry to get things into digital format, not thinking about the downside.
Microfilm can last well over a hundred years if stored properly. It requires nothing more than magnification in order to be useful.
Digital formats change like the wind, along with storage media. Who thinks that software to read JPG, TIF or PDF files will be available in a hundred years? Who is going to keep converting file formats as years go by, and recopy the data to whatever the latest storage medium is?
Microfilm is the perfect storage solution for what it is used for.