Don't not get a divorce to "save money" or "preserve assets"
The longer the marriage, the worse your exposure to property division and alimony and because of changes in the Massachusetts laws of intestacy, the surviving spouse has priority of appointment as Personal Representative of your estate and potentially a larger share of the estate than before.
You are not saving money by not getting a divorceThe length of the marriage is a significant factor in property division and the conduct during separation is also a factor in property division, among other factors. You are complicating your case by waiting to go forward as you subject your assets including those after the break up/separation. What if you inherit property during the separation? The length of marriage is a significant factor in determining the duration of alimony, also! What are you saving by not resolving these issues!
Do you want your estranged spouse to become the personal representative of your estate? or worse?Because of the Probate Code having been enacted in Massachusetts and depending upon whether you have children from this marriage or from another relationship, your spouse could have a significant and perhaps full share of your estate, especially if you don't address matters in a Will, but even if you do, there are also statutes concerning the spouse's rights .