When writing QML animations, you sometimes run into the case where you want to disable animations when some flag is set. This is often easier than adding a state, especially if the states are very complex. To disable some animations you have to currently write code like this,

Transition {
    NumberAnimation { target: root; property: "height"; duration: enableAnimations ? 200 : 0  }
    // repeat for other animations too
}

It would result in clearer QML code if the user can just assign the "enableAnimations" property to enabled. Also, the animations would still be toolable with the addition of this property.