Elder Scrolls mostly relies on the modding community in my opinion. They build a easily malleable foundation on which users can create.
With technological advancements, and the emergence of platforms of similar nature such as Roblox, that foundation becomes less and less valuable. That's not even talking about how other open-world games out here have changed the way people appreciate this type of games. It's going to be tough for some people to go back and accept the limitations inherent to the Elder Scroll model after playing the Witcher 3 or Breath of the Wild.
I don't think people are that hyped about an Elder Scrolls 6 and I don't think they should be.