I can't think of hardly anybody around here that has a grapple on a farm tractor.  Easier to pop the bucket off and pickup the bale spear that isn't so hard on the bales I think.  It might just be me, but I can't imagine useing the grapple bucket for things that I would regularly use the bucket for,  would seem like it would make it awkward and clumsy.  Funny how things are so different across different areas.