Nuendo's "Open In Wavelab" doesn't open 5.1-files

Not trying to be funny just trying to understand. Sorry if I ruffled your feathers…Not sure why you would want to open multichannel files in WL since you are already in Nuendo. Is there some magic thing that WL can do that Nuendo cannot? I am really trying to understand why it is so important for WL to be “multichannel” in the edit window.