Of course your husband is still in MLC, TT. You are just trying to want him to crash way before he is ready for it. MLC can take many years and Replay can last a very long time.
Some of us know Jung, Albatross.
Probelm is, some of us, at least me, knows Jung enough to not to take all he said to the letter. Why? Decades have passed since Jung and his wife (anima/animus are his wife Emma work, not his), and they were mainly focused on the psychological aspect of things, not taking into consideration biological factors (those being hormonal, brain chemicals, or others).
Is is possible that what they were observing, and we also are, is a result of an hormonal and neurochemical imbalance that provokes psychological changes.
Yes, if OW/OM don't provide enough high and MLCer can found something to give them the high. Or can always have had something that provide the high. Mr J always had his clubbing/DJing to provide the high, OW is just an accessory but one who causes a lot of damages and is very expensive.
TT and Snowdrop you are wondering too much and taking Jung too the letter. Jung is fine but one should be a little cautions and not to simple eat all he has said/think.
Still, I doubt any of your husbands has reached the end of their crisis or is stuck in MLC. They have not been in crisis for that long.
A few MLCers never get out of MLC but that is rare. Some MLCer take more than 2,3,4, or even 7 years. More often than not it will be the LBS who will close the door.
Hope all goes well with you and your husband, StillHoping.
Sometimes good things fall apart so better things can fall together. (Marilyn Monroe)