Even though many of us have similar circumstances (long seemingly good marriage, husband acts weird then runs...) there are also differences...
Mine was a almost instant vanisher. Yes, he was emotionally abusive to me for a few years before he left but most of my memories are very good. We had 25+ years of being true partners, laughter and love, vacations, holidays, raising a family, etc... too many memories to list.
As the divorce was going on, so much drama and hurt, most of the hurt was him moving on so quickly like I didn't matter.
Now it's over five years since he left. It wasn't easy at first but over time the good memories, for me, very much outweigh the bad. For him, in the early days he often accused me of things like being really good at making HIM feel guilty. We all know that his guilt were b/c of his actions, not my words, but that's how he felt.
Now?
I really truly feel he tries not to think of it BUT... thirty years, thirty years is the entire time our kids were growing up, his twenties, thirties, most of his forties,... all with me. What were his bad memories?
Oh yeah, the fear of getting old. Has that fear subsided now that another birthday is coming up? Can he talk about that fear with his barely 30 year old Mrs-tress?
The good (or bad, your choice) of having a vanisher is we get to choose which memories to focus on. They aren't in front of us still heaping daily emotional abuse. So what do we want to remember? Why would it be any different for them?
I think even the memories are a choice.