I'm not personally a fan of many of the mods on there, but comparing it to NWN is a bit unfair, especially given how long NWN had to grow and its toolset.
For the purpose of this thread, though, mods did happen for larger parties, including a file change to support more people online.
Not really unfair; with the NWN games, people were actively creating content well ahead of the game releases because there was a lot of community engagement by the developers. Obviously the quality and usability of a toolset, post-release, also affects how many people can indulge their creativity, but you have to spark some interest early.
Maybe nobody cares as much any more, or perhaps the creative community prefer Bethesda style RPGs to D&D?