Happy Birthday Z-Bube.
I feel for you. NPD is so hard to deal with. I'm pretty sure I mentioned my aunt has it. She lost all contact with her children. Very sad. Lives alone with a few calls a year from my mom (we live in a different state).
You are only 50. Could live another 50 years. Are you really willing to live like this with none of your needs being met? I relate to some of your situation although I am not dealing with the NPD. Still, my H has a personality that is so entrenched in him that I don't know if he will ever be able to meet some of my emotional needs. And not that he doesn't want to. I truly believe he has no idea how to do so. With the diagnosis of NPD in your W, I can almost guarantee she has no idea how to meet your needs. I think you may be wrong in your comment that if she really wanted to she would. Some people do not have it in them to think that way. As painful as that is, the mental health treatment for any personality disorder to Not very effective. It is very sad. I am sorry you are going through all of this Z-Bube.
I'm going to just tell you that my cousins are very happy to no longer have to deal with their mother. Of course they regret having to ever make that decision but they believe it was the right one. Sometimes you need to adjust your values when the circumstances are so extreme.