Hi, L, nice to hear from you!
What you said about children resonates with me as well; it really is sad. Mine were small when this started, they are now in their mid-20s but the effects are long-reaching. All 3 struggle in one way or another, it's affected their self-esteem, their own relationships, their outlook on life. We can say that "kids are resilient" all we want, but I don't think they are. They continue to need me to be the rock, probably more than many others their age.
Overall they are doing well; they have all graduated from university, all have good jobs, have good friends, have lives. But this casts a long shadow.
As to my MLCer; I haven't now seen him for something like 6 years; he sees the children very rarely. One son just avoids, has the occasional superficial conversation; the other does meet him now and again for a short time but always comes back disappointed, saying "father not being a father", my daughter has probably suffered most, as how her father treats her (and me) has affected her view of how men treat women in general. She so needs him, but he just isn't there, and indeed has been quite nasty at times. She went something like 3 years without seeing him at one point, it's been over a year since the last time now.
One son so doesn't want to be like him, that he expects unrealistic things of himself. He will get through this, but it's not easy.
All have tried to say something over the years, they have given up.
As to his crisis; I have no idea what he is like right, but from what I hear (or see the odd photo somewhere) it seems that his crisis has become a way of life, as you say. I can't say that I like what little I hear/see.
But on some level I will admit that I still miss him, I miss the person that was. My children do as well, although they don't remember much any more, which is also sad.
My life is also now "normal" -- many joys, normal ups and downs, not much drama, which is good. Retirement not yet on the horizon, but I'm planning new things to do this year which keeps me going!
I'm glad you have been able to retire and enjoy the next phase of life!