A Steam Community Group Announcement has word that the new version 4.1.2 update for Fallout 4 is now out of beta, and is live in the action/RPG sequel. This apparently breaks mod support for the game, which is not mentioned in the patch notes, so it's not clear if this is intentional. A post on the Nexus Forums outlines a way to work around this for now, though there are also posts noting that some mods will need to be reworked, as they still don't work even if you get them to load. Thanks Duane.