The debate over when medium is better, paper or film or digital, has been with us for some time now. A good review of the topic with a fairly complete explanation about why he thinks digital media is best, is provided by Dick Eastman in Online Genealogy Newsletter.
The key is following good procedures, such as have been practiced in responsible data centers for years.
Dick outlines those practices and explains how we can put them to use in our own data storage and preservation schemes.
You can read Dick's article at http://tinyurl.com/29oe6zw