I'll go even further than this. If you want to group the entire world together and get really general, I'll give you "no one backs up their data at all."

That's far more accurate. Honestly, of my neighbors who are very close friends (let's say 5 families), there is only 1 that I know backs up their data and has been doing it for over a year (at my insistence). I've gotten another one to back up some data to iCloud and I'm trying to get the others on board. In fact, the others have external WD pocket drives and the like with their original photos - and they use these drives for daily moving of files around as well or to play media on their media streamers. Accidents waiting to happen.