Cool, James. That is some good anecdotal evidence that accidents/incidents are indeed occurring due to pilots and controllers working with technology and missing something outside the window. Not enough to establish a definitive trend or 'uptick' in accidents, but useful nonetheless to illustrate the point that it happens.
Just a NASA call back report
But it's obvious that the more stuff you have to look at in the cockpit, the more your head is going to be in the cockpit.
This is where building that initial foundation without all the screens comes in, than adding them later.
It's knowing what information you need and when.
I've told this story before, but
Years ago I was checking a VFR PPL out in a rental, it was a G1000 172, we went up and did the thing, all was ok, but his eyes were inside a bit, especially for a SoCal clear blue and 92 kinda day.
I give him a heading for something, might have been for a steep turn or whatever, anywho this heading had us pointing at a somewhat distant mountain range.
I asked if we would clear that range at our present altitude and heading, he starts fumbling around with the G1000, I asked what he was looking for, he says the terrain screen, I told him I'd show him how to get it in a second, I hit the duplicate screen display so he lost what he was trying to do on my screen, I asked him to look out the window and tell me if we were going to clear, he looked out the window for a second and then went back trying fiddle with the G1000, I told him to forget it and take us back to the airport and we wouldn't be renting him without a good bit of dual instruction.