LostLEGION

This is true. Basically it all comes down to which service is most convenience and easy to browse, a war Steam would for sure win. (Casual players who played Skyrim as their first Bethesda game could download mods much much easier) But, if the sense of community is strong, and tweaks to how Nexus presents itself to be cleaner and better (right now it still needs improvement imo) are employed, I think Nexus would still very well have an edge. (It already has the former) Even for Half-Life 2 mods the majority is at moddb and not on steam, and hopefully it'd the same or at least equally distributed.

As excited I am about the launch of the Creation Kit, I'm hoping all mods would be at Nexus and Steam Workshop. Steam Workshop is easy to upload and download, convenient for both the modder and the player. But I love the Nexus sites, I really really hope the community would not be split or mass migrated over to SW, that all modders would have an easy way to upload to both sites at the same time so people from both worlds would get to enjoy those wonderful mods.