Good topic Treasur. I hope it helps you find the answers you're looking for. And I hope it helps you to decide to continue helping others by posting your thoughts here on the forum.
I probably qualify now as a long term stander. It's been 5.5 years since BD and I'm still standing.
The first thing I want to say is that I have no opinion on whether anyone else should stand or not stand. That's a personal decision that everyone has to make for themselves. And I wouldn't fault anyone for choosing not to stand. As it states in the article that Treasur linked to, MLC takes an incredibly long time and it has no guaranteed outcome. Knowing that, you would have to have a pretty good reason or reasons for standing. Or you would have to be in denial.
In order to stand for this long I had to decide why I was standing. The truth is that I'm an incredibly selfish person. I'm not standing for my wife or my marriage or my family. I'm standing for me. I'm standing because I need to know that I did everything possible to restore my marriage and my family. I like what Courage and Trusting wrote about standing being a day to day decision that continues until it doesn't seem right any more. It's possible that I might decide tomorrow that I've done everything I can do and it's time to stop standing. I doubt it but it could happen.
There are some things that have made it easier to stand for so long.
If I were younger and more attractive to the opposite sex or wealthier and more attractive to the opposite sex it might be more difficult to stand for so long.
If, when BD struck, I didn't have 36 years invested in our relationship, our life together, and our family then it might be more difficult to stand for so long.
If I didn't believe so strongly that my wife violating the oath should spoke doesn't justify me violating the oath that I spoke, then it might be more difficult to stand for so long.
If my wife hadn't stood by me and supported me for 6 years during the late 80s and early 90s when I had unrecognized PTSD, was emotionally distant, was having panic attacks and nightmares, and was depressed and was even briefly hospitalized for depression, then it might be more difficult to stand for so long.
The last three are the most critical IMO.
If I didn't completely believe that my wife is going through a crisis that she didn't ask for, didn't cause, doesn't understand, and has no control over; a crisis that has temporarily changed her into someone who is nothing like the woman I was married to; a crisis that has resulted in her doing things the woman I was married to would never have done, then I'm sure it would be more difficult to stand for so long.
If I hadn't experienced for myself what my wife is currently going through, then I'm sure it would be more difficult to stand for so long.
If I could figure out how to stop loving her, then I'm sure it would be more difficult to stand for so long.