You are both right.
Over the last week they were not sure if there was any water in. As Brett said. Water not confirmed.
To hide it "underconstruction" is something i would assume too.
So we, as community, can always say "Remember. That is why it is hidden under that phrase."
And people are always remembered by typing in.
But if they would not include it in any way. They would not have shown it in the videos i guess.
Water. So often used, so barely appreciated and yet a lot of people, including me, can be so passionate about it.
EDIT: I think Frontier had a good experience by including a basic version of coasters in Alpha 1.