lol
I went over to the Nexus forums to have a look at the trainwreck, here's a couple of choice picks:
I figure having Steam running in offline mode for a while should hold off the update... But that is a temporary solution as I've found out on another game that eventually Steam will require you to update it even if Steam has been in offline mode while still connected to the Internet, because Steam itself still updates in offline mode.
Yep! No more offline privileges for you, citizen, you'll be online and you'll motherfucking like it! Been that way for a while now. Keep "purchasing products" on Steam, though, I'm sure this sort of shit won't happen again.
BGS changed the BA2 (archive) format. I just recreated the archive of my Recruit Jenny mod with the updated Archive2, the offical dev tool to create archives beyond the Creation Kit. Since Recruit Jenny contains voice assets as well, I chose Compression: None, everything was left on default. The pre-update EXE (v1.10.163) couldn't load the archive (quest script wasn't detected, Jenny had no voice) but it didn't crash. I opened the .esp of Recruit Jenny with the updated Creation Kit, then saved it. The pre-update EXE (v1.10.163) could load it fine (mod file Header Version didn't change either). (The post-update EXE (v1.10.980) can load earlier BA2 files, they can be used for pre/post update compatibility).
TL;DR: Todd updated the BA2 format such that the new .exe can read the old ones, but BA2s generated on the new standard can't be loaded by the old builds. If it's true, it'll force a fracture in the modding scene, like the split between Skyrim and Skyrim Special Edition except this time there'll be no separate packages. We've reached the point where it's impossible to tell the difference between Bethesda's incompetence and outright malice.