Printed publications are more durable, and less likely to become obsolete later due to a format change. I can still reread my dragon magazines from the 1970's without any problems. I doubt the same can be said of computer documents from the 1970's.
True enough! It's the same reason I keep getting prints made of my digital artwork commissions - sure, they look nice on the computer screen, but there's something nicer about enjoying the real version sitting up in a frame on the wall.