What the ending to the WAS script then, I feel like the end result or the result that is expected is divorce... I feel like that contradicts truly DBing.
The ending is an unknown. There are no guarantees. That's why DB focuses on you rather than the M. Because if you make yourself a better person, you win regardless of what happens with the M.
That said, I will give you the 4 examples of the "end result" that I know of first-hand:
My mom was a WAW. She tried to return about 6 months later, but dad was done with her and had moved on. He told her to take a hike.
My stepdad's first wife was a WAW. She tried to return 2 years later and he told her he wasn't interested.
One of my neighbors was a WAW. She left her husband, start partying like it's 1999, got a big dragonfly tattoo on her back with "she finally has her wings" in latin around it. 6 months later she was back at home and still is several months later.
A good buddy of mine's 2nd wife was a WAW. They barely spoke for a year. Then they started talking, then going out, then ML and now are talking about reconciling (2 years after she walked).
These men all moved on with their lives and at that point found their W's suddenly returning. Two of them had lost interest by then while two of them had not. I think the real key here is to note how much time was involved. Even in the DB success stories it is very rare for a sitch to resolve in less than a few months. Most of the time it takes 6 months to a year, sometimes longer than that (especially if MLC is involved). I think if more LBS's were able to wait, more marriages would hold together. I also think a lot of it is poor information, outside of these forums and Michele's books there's little hope offered to LBS's. Typically they're told to move on, that their spouse is done and gone. If the world was more familiar with DB'ing and understaood that most WAS's negative attitudes are TEMPORARY, I think many more marriages would be saved.