Otherwise, a bunch of common advice that most here agree on, would be throw out the window... written timeline, telling the OBS, NC, quitting the job if work-related affair, polygraph, et al... each of those actions "evoke a response from the WS"
None of that is relevant unless R is on the table, and if R is on the table, filing for D is probably premature.
A BS tells OBS out of kindness and duty. The WS is irrelevant to that. For sure, there are other motivations, but kindness and duty are paramount. It's an open-ended action - the BS can't ever be sure of the consequences of telling.
Timeline, NC, new job, poly - the BS heals in part - and strengthens themself - by figuring out and stating what they want. The BS tells the WS what the requirements for R are. The WS has to choose between 4 responses: accept, reject, negotiate, ignore/change the subject. With a positive acceptance of observable requirements for R, D is probably the best choice.
But one states one's requirements primarily for oneself. When people respect the boundaries, great. When they don't, the boundary setter knows they have to figure out how to maintain them.
IMO, it's a good idea to file for D if you want D.
Yet they can begin healing as the divorce case works its way through the system.
Only if D is what the BS wants. If the BS is undecided, the proceedings probably increase stress on the BS and WS.
But a BS that has filed for divorce has a significant advantage....
Hmmm ... I think you're presupposing something about WSes that probably isn't true. Your thinking seems to be based on an image of a WS who knows what they want and who thinks tactically and strategically.
For the most part, IMO and IME, WSes are fucked up individuals who are as disoriented as their BSes tend to be. For the most part, IMO, they barely think tactically, and they don't think strategically. Unless the advantages of filing first that you write of are relevant to one's own specific sitch, they aren't advantages that one can make use of. They're irrelevant.
You're also forgetting some big disadvantages:
1) the retainer. Some people can't afford the retainer. My W had a very simple issue arising from her A (much simpler than D), and the retainer was $5k. Our son's retainer for a simple D was $10K, IIRC, but that was a few years ago;
2) managing the process and the attorney takes time and energy the BS probably doesn't have to spare;
3) most important: your approach is focused on the WS. Filing for D just in case you'll eventually need to file is the opposite of the BS taking control. It's the BS letting fear of what the WS may do take control of themself.
As I read posts from new and relatively new members of SI (say, under a year of memberships or maybe a little more), most people come here not knowing what they want, should, or will do. Their energy is much better spent attending to themselves.
Acting mindfully so as to get what the BS wants is the BS's best course of action. By all means, a BS is wise to file for D if that's what they want. If they're undecided or really want R, I expect filing for D is a distraction.
*****
There are definitely times when I would counsel filing. For instance, when the WS leaves home to be with the ap or when the BS realizes they don't want to be married to their WS or when the WS is unremorseful/unwilling to do the work to change from cheater to good partner.
*****
To those who urge BSes to file before they're ready:
What options did you consider?
How did your decision process lead you to choose that course of action?
What did you do?
[This message edited by SI Staff at 7:28 PM, Monday, August 19th]