Full disclosure, I did not read all the replies here (just the first few pages) so please forgive me if I missed a change.
From the original post I read it as being this, for true reconciliation, you need to stop punishing your spouse. (On that point I completely agree) In order to do that, after a certain amount of time, you must no longer bring up the affair, because if you do you are preventing your spouse from living a normal life, punishing them and holding a grudge.
I am coming up on five years past DDay. My husband leapt into the work to earn a second chance pretty much immediately. He's a rebuilder in every sense of the word and although I was pretty skeptical for a few years, he has shown nothing but consistent and sustained changes. We both have worked diligently on our own healing through therapy (I did EMDR, somatic experiencing as well as regular talk therapy). We were very lucky and stumbled upon a trauma informed marriage counselor who was experienced in working with couples impacted by infidelity (who DID NOT like Esther Perel) and who helped us both immensely in righting the ship.
Today we have a very equitable AND loving marriage. We contribute pretty darned equally to the finances, child rearing, running of the household, chores, etc. We are both still with therapists who we check in with semi-regularly to ensure we are still in a good position but it doesn't take the time it once did. We both meditate and journal and water our own internal gardens (exercise, hobbies like reading and yoga). We enjoy hanging out together. We have a rewarding love life. We support each other in hard times and we celebrate each others wins. I feel 100% certain and happy when I say that at this point, we are partners in every sense of the word. I love him and I trust that he loves me. We show love every day and we consider it a verb rather than just a feeling. We have lots of romance and our kids often tease us about all the hugging and kisses.
Not long ago, I had the _same_ thought as you OP. I thought - okay, this man is amazing. He has proven he has changed. He has shown good boundaries in so many ways, he has put our marriage and our family above everything else on a daily basis for years now. It's time to put this away.
I don't have triggers often and most of the ones I do are tiny blips that don't last more than a minute. My mindfulness training lets me take note of them but I can easily move on.
But as trauma impacts the brain and body in unexpected ways, sometimes a trigger will come out of left field and knock me on my butt a bit harder.
This happened after I had made the decision to keep triggers to myself, naturally I pulled out my trusty dealing-with-hard-stuff-in-a-healthy-way toolkit and felt my feelings, journaled, did some exercises, etc.
But here's the thing about alllll that work my husband and I had done on ourselves and our marriage to regain emotional intimacy and vulnerability...it means that I have an empathetic man who notices when I don't feel right on my hands. Oops!
So of course, he could tell I was upset and asked me about it and I told him "Oh I'm just a little upset its nothing. I will be fine." Which made my husband feel a little bit like I was hiding my feelings (because I was) and that I was being distant (yep - trying not to "bother him" by bringing up my feelings, so emotional distance) and he sensed that there was something off with us.
And later when he managed to get me to talk, he told me that he doesn't feel punished when I bring up the affair because he feels super lucky that he gets to be the person who is still here comforting me . He knows I can deal with it on my own, but that I should not have to because he wants to know what is going on in my heart so he can be there for me when I feel down. That I can trust him to catch me when I stumble.
Because that is all it is - a stumble. Having a trigger and feeling the emotions that arise from it isn't "wallowing in the past". It's just an emotion, that needs to be felt and released.
Its not a grudge because my goal in sharing my feelings is for him to know what is happening inside me, to see me fully.
"I wouldn't have wanted to stay in a marriage where I won every fight because "he's a cheater" and nothing could ever be authentic or real or normal again." You can't hide your feelings AND be authentic. That isn't being real.
Sadly that is being normal but as everyone on SI knows - true emotional availability and vulnerability is unfortunately rare in that is.
I don't bring up the affair every day nor every week and honestly, it doesn't even come up for months at a time at this point. But I know that I can bring it up whenever it DOES impact me for the rest of our lives together and that I will be heard and comforted and kissed and then we will move on to other things (like going swimming or watching a movie or making dinner together). Just like anything that is bothering my spouse at the time can be brought to me. That's the marriage we both want. One where we can talk about practically anything and support one another.
I now really believe that sometimes when we push down or hide our feelings or just deal with it ourselves, we rob our spouses of the chance to show exactly how great they are at this partnership thing. Leaning on your loved one emotionally strengthens bonds.
(YMMV obviously)