Pretty models in wind tunnels are one thing.So are 3d renders but scaling it up to big size brings a whole lot more issues..Bigger platform= bigger
engine= bigger fuel load.
For Anyone Interested in more Information about ADIFO here Are some Videos I have found, I Highly Recommend watching Them
And These People who are working on This like aerodynamicist Iosif Taposu (Senior Scientist at Romania's National Institute for Aerospatial Research,
and former Head of Theoretical Aerodynamics at the National Aviation Institute),I do hope they do more to develop the concept,They have built a
working prototype with a 1.2-meter (3.9-ft) diameter for Testing , For anyone who forgets what that word means.
And Once again i would like to reiterate That Its Whole body is a Wing.