Would love to see MultiBindings support as NoesisGUI is now much smarter regarding the text formatting - support for Binding StringFormat was added recently and we're trying to use it actively but the problem is - we often have more than a single binding and so we must use multibinding:

<TextBlock>

<TextBlock.Text>

<MultiBinding StringFormat="Quest: {0} ({1})">

<Binding Path="Title" />

<Binding Path="Category" />

</MultiBinding>

</TextBlock.Text>

</TextBlock>

It will also allow scenarios when visibility is defined by multiple parameters (when all visible - the element should be visible) - currently, as a workaround, we have to use nesting of content controls with each control binding its visibility to a single property.

Only after I had created a nice solution for my problem with MultiBinding and IMultiValueConverter, I remembered that this way is not supported yet. It's sad.