For multi-platform games (e.g., Nintendo Switch), users often experience significant delays in receiving these hotfixes compared to PC versions due to platform approval processes. Installation Best Practices Guide :: FO4 Bash it Right! - Steam Community
Hotfixes are typically released to resolve "game-breaking" errors, crashes, or exploits that cannot wait for a scheduled patch.
This specific update is intended to transition a software or game installation from the "Hotfix 1" state to "Hotfix 2".