Ah, I was thinking faerie, or angel wings, not aircraft type w1ngs. Still, I don't see why is couldn't use rotations to fold the wings back or forwards, if it was rigged appropriately, with the joint centers in the middle of those circular bits. Of course if you wanted the individual "feathers" to fold, it would mean adding a lot more actors, so you might want to fudge that with a morph.

The big problem with using morphs to emulate a rotation is, that a morph can only move a vertex in a straight line. So a morph that looks good at 45° rotation will look wrong at 90° rotation, and vice versa. For small rotations, you can often get away with morphs, but for large ones you need to use rotation channels.