Oops it looks like we are posting at the same time Mozza.
I have many friends in real life who have reconciled after separation. The stories are usually about the WAS being immature or having some kind of life crisis and needing to go find themselves. Feeling like the relationship wasn't right and they needed to go search for someone else. The LBS then trying to move on with their lives but often staying in some sort of contact as friends.
Something happens... the WAS splits up with OP, the LBS starts dating someone and is happy, the WAS grows up and realizes their mistake, or an external event pushes them together. Something shifts and the two start spending time together again and eventually work it out. It's not easy or perfect but they now both know they are in it together.
While my LBS friends didn't know about DB I don't think, they often put some of the ideas into practice. They didn't beg & plead, they developed confidence and moved on. Maybe they were friendly, maybe they avoided the WAS but they always kept the door of communication open. I don't think any of them went dark for long. More like a period of detaching and then talking once in a while. Some of them even stayed living in the same house but had separate lives. Ugh, difficult!
Hope this answers your question Mozza! I too am fascinated by the stories of reconciliation and how it all came about in the end.