Using a Tabbox and children binding with template to dynamically update the tabs and tabpanel contents it is not very suitable in combination with <include src="@child.zulSrc"> inside a tabpanel. Each time the children model changes all includes are reloaded causing alot overhead.
Using MVC it is possible to just add one tab(panel) without the others being reloaded.

A way to achieve the same efficiency in MVVM would be useful (possibly using a similar functionality like in grid or listbox with ListModel)