https://www.pcgamer.com/fallout-76-fans-call-out-perceived-brotherhood-of-steel-timeline-discrepancy/

A group of Fallout 76 fans have called out a perceived discrepancy in Fallout 76's timeline, relative to long-serving series faction The Brotherhood of Steel. 

As reported by Eurogamer, Reddit user Baffodil voiced concerns about the following in-game note which alludes to the Brotherhood's presence in West Virginia's Appalachia—the setting of the incoming multiplayer shooter RPG. Baffodil, and a number of other prospective players, reckon the BoS's presence in east coast USA in the year 2102 (when 76 takes place) is less than likely.