I have an iPad, and an iPhone with every chart and plate there is. I carry a charger, and a portable battery with me. That's redundancy. Unless you have multiple charts in different locations, saying that paper is more reliable than iPad/iPhone is a ridiculous arguement.
Saying "batteries die, devices break, iPads overheat", is like saying "coffee spills on paper, paper rips, paper can go under seat where you can't reach."
Paper is inferior to an EFB in every way.
The only exception is when someone uses the EFB like an idiot. Setting it on the dash, not bringing a charge source, not knowing how to use it.