I just want to point out that the more popular idea, where Obi-wan leaves Ani in the lava and we never see Ani again, provides the user with convincing reasons as to why Obi-wan lies to Luke in ANH: "Oh, this guy named Vader, who I'd love to see dead, because he's the villain of this film, HE killed your father, definitely not me the only guy around who can set you on the right path. Definitely wasn't me! It was that bad guy!"
So, you'd be losing that.