[oinksoft]

In my experience, it's vastly more likely that a mobile device loses reception, power, etc. than it is that my paper suddenly goes up in flames. I'd probably have bigger problems to deal with if that were to happen. Paper relies on any old light source and can be preserved for a terribly long time (Dead Sea Scrolls) in the right conditions. It can be torn and soaked and retain its message, being such a reliable medium.