I could be wrong, but in my understanding, the whole POINT of DB is what to do when one person has moved on.
I guess what I meant is I don't see a R in the future
I know that's what you meant.
Let's say you "give up". You help push through this divorce, it gets done, you never talk to your W again. What have you learned? How will your next relationship be better?
We all come here trying to SAVE OUR MARRIAGES. But, to be honest, there is nothing that we can do to save the marriage; it takes two to be in a relationship, and you can't control whether the other person wil change their mind.
What we DO control is ourselves. We control how we react with our spouses, how we interact with other people, how we react to our spouses, etc. By examining ourselves and improving the person we are and the way that we interact with others, we become better, more attractive versions of ourselves. And there's a CHANCE our spouses will want to date THAT person.
So the steps are really: 1) set goals for who you want to be 2) achieve those goals 3) your spouse takes notice 4) you decide whether to reconcile together
What if you decide to give up on this relationship and start again. In order to find s new mate, I'd expect you'd do the following: 1) set goals for who you want to be 2) achieve those goals 3) start dating
DBing is all about the first two steps. So, yes, you CAN DB when one person has moved on. You can't see what your step 3 will be until you're in step 2.