I can only talk about my mods (FNNCQ, Time for bed, Iguanas). I don't want to simply port my mods to NV. It's a different game with a different mood and pace. It deserves it that I pay attention to this and don't make a simple port.
I am pretty sure other serious modders think the same and the development of the new things takes time.
I am pretty sure other serious modders think the same and the development of the new things takes time.
This.
The difference in tone can be (is) rather jarring if straight-up FO3 ports are plonked into the NV atmosphere. Maybe not so much with YourFavouriteWeaponMod, but anything regarding quests, dialogue and companions is going to take time to either convert or create.