Limitations of XamlWriter.Save method

XamlWriter.Save method is very much useful if we need to preserve the state of an application.But when I used this method extensively, I came to know some limitations.Here is the list.

1. From Microsoft http://msdn.microsoft.com/en-us/library/ms754193.aspx
2. We can't save Style of a control which contains VisualStateManger nodes ie we will loose vsm support if we save using XamlWriter.Save method.

Will be extending whenever I find more.