Push Objects is needed in Print too!
I disagree. A web page is flexible. It can be as short as one screen or it can extend downward indefinitely. Maybe all the way to China.

A print document is a specific size that cannot be extended beyond the dimensions of the print size.

Xara does have the ability (I use this when I am producing a book), to add new pages when the page is filled with text. This essentially is a push type feature and maybe the answer to your suggestion.

Automatically create new page and the tracking adjustments are the two main reasons I swim against the current and use Designer Pro+ to produce books. (That and laziness)