After my ex and I stopped talking, I felt like this a lot:
Honestly, I'm glad that I moved. Yes, it does feel lonely at times, but it's getting a heck of a lot easier to deal with.
The relief was a big deal for me too.

I think once she found out that I was moving (about a month ago) and now especially that I am gone, she no longer sees me as a threat or someone she can use for.
Yes I do think that sometimes the ability of the pwBPD to dysregulate disappears quickly when you're simply less present. The non also sees less of it (if any is there) because there is less exposure. I think this not being seen as a threat or a usable person is also true when the non has a clearer way to disengage an argument with him or her if NC isn't an option.
Thanks for the update thrownforaloop.
