http://www.newsweek.com/fallout-76-gameplay-details-single-player-1158383

The moment that sold me on the single-player potential of Fallout 76 is like most other great Fallout moments — unscripted. I stumbled upon a radio tower swarming with Super Mutants. A vicious gunfight ensued. After killing everything (barely), I ascend the tower, certain great loot awaits. A locked safe at the top requires a key. There’s a note nearby (of course). It’s a sarcastic farewell note to the Super Mutants from their victims that explains the key was tossed from the tower. It’s on an outhouse roof, the note says, but the Super Mutants won’t ever know because they “can’t read.” I scramble down, find the key, scramble up and get some loot. I take a few steps to admire the view, and trigger a survey mechanic that highlights several points of interest nearby. I pick my next one and go.

“As we were playing the games ourselves we thought it felt empty so we ended up just adding 4x the amount of content as well. So there's an incredible amount of the notes, the holotapes and there's an incredible amount of environmental storytelling that our artists and designers are kind of famous for,” said Jeff Gardiner, Project Leader for Fallout 76 . Once the team settled on a player count, Bethesda realized a map 4x the size of Fallout 4 needed 4x the stuff. “There's a ton of that all over, hidden pockets where all that exists.”