I went to a new Al-Anon meeting recently. There were 3 people there who were still married to their A's, and each of the A's had been sober at least 20 years. One of them had been sober 27 years. I don't know the stories of each of these couples, but this sounds pretty darn successful to me.
For me, I'm learning to find my success in small doses. My AH has been sober for 5 weeks now. I feel like I've found my best friend again. I'm cautiously optimistic for the future knowing that he could relapse at any time. There's no guarantee that he won't. However, I must also think about how ANYTHING could happen to anyone at anytime. I could be married to a sober guy who gets a devastating illness etc etc. I try not to obsess over what might happen as I forget enjoy what I have now.
Best to you Jd77!