Well, here's another reason I like to have paper copies and not rely only on my device (in my case, an ipad) for everything. When we were in Venice last week, we were getting on a very crowded vaporetto when we arrived. There was (I believe) a German lady who as soon as she got on, took out her phone to look at something - she instantly fumbled it and it hit the floor and slid into the lagoon, since she was right beside the gate. Cue teeth gnashing and perhaps accusations towards the man with her. Oops.
So - gentle warning - if you're standing by the edge of the vaporetto - don't take out your phone! Seeing how many people use their phones to do pics/videos while on the vaps, I got to wondering how many are languishing at the bottom of the lagoon.
Also saw someone's Birkenstock floating in the middle of the canal - lol.