This code is marked as deprecated from Foundation in 6.3 we just haven't updated the class names yet in the snippet.
This was implemented before the release of Foundation 6.3 which introduced Cards, so we may transition to the Foundation code soon.
We need to update this to allow for user to pick if they want to stack on small. Right now, it does it all the time.
News boxes has an extra XSL check to see if the snippet was used, then we insert some extra JavaScript to call out to the WP API.