My understatement of MLC is that its roots are biochemical (this encompasses brain and body - biochemical means relating to the chemical processes and substances which occur within living organisms). There could be some genetic predisposition, but I don't have much to base it upon. Some MLCer have a parent (or parents) that have had MLC, other don't.
Your articles pick on Jungian theory. That was how I arrived here, googling Jung + midlife crisis. In Jungian theory what we call midlife crisis is a transition period, a transformation. It starts with separation and ends with reintegration. The individual has to go through a trying psychologic and emotional period, after which they are reborn. After rebirth, there is reintegration, and the person has become a better, mature version of itself.
That was more or less my view of MLC before I start to become familiar with neuroscience/neurobiology/biology, as well as observing real life midlife cases and reading the board stories. There is one common denominator to MLCer, high levels of stress. And depression, of course. Cover for high energy one, more over for wallowers.
I think to a certain extent to believe/think the LBS has some influence upon the MLCer crisis. I don't agree with that. Even in Jungian theory the identity crisis is personal, not related to the marriage or the spouse. For someone who thinks MLC is biochemical, MLC is an issue that only pertains to the MLCer. Circumstances may, and often do, affect a person an their behaviours, but there is no way of knowing what or who affect the MLCer. It could had been work, friends, hobbies, family of origin or any other issue. The only thing I manage to gather and to align with MLCer as a whole is stress.
You philosophy regarding Standing stems from not liking divorce, think that MLC is temporary (it is) and that it is worthy to wait for the MLCer crisis to end. You also think reconnections/reconciliations are more likely if the MLCer returns within 3-3-5 years. I believe you also see standing as a grace period for the LBS. It allows us time to process, detach, thing, work on ourselves.
What I think the articles do not reflect is that, often, MLC last a real long time (I don't mean 5 or 7 years) and all that happens during that time. They also do not reflect what we have been seeing, MLCer who have been in crisis for years divorcing at year 5, 9, etc. I think you had not factored that many crisis could last so long, and that Escape & avoid could be up to 10 or more years. Nor that at year 5 or 9, or 10, a MLCer may still be deep in crisis and divorce their LBS so many years after BD.
The idea that MLC last, on average 3-7 years does not seem very accurate. There are many LBS here whose spouse has been in Escape & Avoid for more than 5 years and MLC does not end with Escape & Avoid.
It may also be asking too much from people to remain married to someone who has been in crisis for so long and not to move on with their lives, leaving the MLCer behind for good. It is not very realistic to expect reconnections or reconciliations in large, or even medium, numbers, when so many MLCer take so long in their crisis.
Do MLCer really become a better version of themselves after the crisis? I think so, but it would not be far fetched to realise that after so many years, even if the MLCer is a better person, MLCer and LBS may no longer share a connection, have similar interests and goals, etc. Not to mention that the type of love to sustain a relationship may no longer be there. Agape can be there, but agape does not sustain a relationship/marriage.
To a point, you underestimate the damages of all sort the MLCer causes. I suppose early on, when HS started, you had a more romantic view of MLC. You have been adjustting the average times of MLC, which show that early on who though it lasted far less than it does. The articles also do not leave it clear that monster can be present for a decade or so. Nor that the Replay behaviour can last that long and keep increasing for years on end.
From the articles one has the notion MLC will last a while, a good while, but not that long and that the MLCer may more or less be tired of the Replay behaviour relatively soon, that a deeper depression will set in, and, gradually, the MLCer will be seeing the light at the end of the tunnel. The Replay time is extremely long.
OW/OM, they are a symptom, but they are also the most damaging part of MLC. And, in my view, affair is not the word to describe a relationship that is often marital like and can last many, many years. For me, affair is short lived, intense thing, not living with OW/OM for 6 or 8 or more years. OW/OM and MLCer relationships may not be good, but they can last more than some marriages.
Sometimes good things fall apart so better things can fall together. (Marilyn Monroe)