I was reading a review recently about a film from the 1940s as being outdated. The film showed a variety of footage, and while the style is outdated, the material is not.
For a researcher, any material that shows our past can become a 'gold mine' of information that can lead to new discoveries.
In one of these 'outdated' films, I think I found yet another piece to help with the project.
So the next time you think something is outdated, it just might be 'a piece of gold' for someone else.