Why did everyone start playing RotU instead of the original zombies?

[Death{-*-}$hot]

I don't understand, I feel like RotU killed off Call of Duty Zombies for me, the original stayed around for around 6 years but now it's been replaced with a "better" version, I still would love to play with anyone who wants to play the original zombies.

But anyway, why does everyone go on RotU, it justs the same maps over and over it's always repetitive and.... boring.