You can trust the media more than magnetic media. Thermal printing, some inkjet printing, and certain delicate papers may be problematic, but if you're using environmentally controlled storage (or just common sense), you can dramatically increase the lifespan of "hard" media. In healthcare, we recognize that practices have lost complete paper-records for patients due to fire, flood or other natural disaster (or just lost paper files, completely). My argument is that in general, hard-media is more durable than digital media, especially for long-term, environmentally controlled storage and archive.