I thought this way for many years myself. What are The Doors without Jim Morrison? Or The Rolling Stones without Mick Jagger? Judas Priest without Rob Halford? However.......... I learned to give credit to the fact that musician's can hold together over the course of many changes. Ozzy is no different with his solo career; nor was Dio. I'm just sayin!!!!!!!!!!! There is no need to ignore Black Sabbath based upon the fact that they have changed internally.