While disruptive, the update forced a "cleaning of house." Many SKSE plugins that had not been updated in years were suddenly broken. This spurred the community to either update abandoned mods or create open-source alternatives. The necessity of recompiling plugins for 1.6.640 led to a wave of modernization in the codebase of many core utilities, improving stability and memory management in the long term.
: Because this version was the standard for a long time, the vast majority of essential SKSE-dependent mods (like SkyUI, RaceMenu, and Address Library) have perfectly stable versions for it. Widespread Compatibility
If you run SKSE64 1.6.640, you have access to a specific set of not possible in vanilla. Below are the most practical ones:
Guide :: Revert SSE to version 1.6.640 or 1.6.1130 - Steam Community
Following the release, the modding scene split into two primary camps: