Still, keep in mind what you’re installing and how they might impact each other. I didn’t notice any performance degradation at all using Wet and Cold, as many INPCs aren’t even outdoors most of the time. That said, if you have other mods that universally affects all NPCs and are known to be quite script-heavy in doing so, like Wet and Cold or Footprints, please proceed with some caution. In short, the performance impact of this mod is miniscule. It’s not like all 250+ of them are in one cell, ready to ambush the unwary player by overloading the game’s memory in one go. More to the point, INPCs are selectively scattered/hand-placed around the province, in cities and towns and villages, in caves and forts and dungeons. Also, the size of a file has little to do with the memory cap of Skyrim’s game engine. There’s a lot of audio because a lot of dialogue, and while fuz files (Skyrim’s default audio format) are tiny, having thousands of them results in a rather big mod. The size of the mod is due to audio files.