I'm just playing devil's advocate here and print mine out too. But, if you're like me and you switch between 2 packs for deer, one for waterfowl, and a vest for small game/coyotes, it's easy to end up afield without your papers. Being prepared digitally is good CYA.
I tagged savannahs deer in right when I found it on the app. Screen shot it and was on my way to dragging. I did print out tags and license also. A couple years ago my uncle was stoped and he had his on his phone this was before this stuff came out they looked at it and told him he was good to go even tho it wasn't really how he was suppose to have it they new it was coming to it and other states were already that way.