Hi here some new exciting news Blender update with opennurbs lib to new version 7.x now file import can read rhino 6 or higher file.
This at early stage and need some tweaking of surfaces with end point U V. And for now don't supports all features, such as trimmed surfaces but works better after saving file and open that in standard build e changing the end point selecting sometime both end UV or one side end..
Below my test.