I agree that MLC is an overused label and that many marriages where the X supposedly had a MLC are actually SSM.
This is true of my marriage. I thought my X was having an MLC until I read CeMar's posts here.

CeMar, the problem is that my X never explained his dissatisfaction to me anywhere NEAR as explicitly as he needed to in order to make me understand.

How are YOU coming along in that department, CeMar? I see your posts here are saying pretty much the same thing here as they always have. If you spent 1/100th the amount of time explaining things to your wife as you do complaining here, you would break up the logjam in your marriage by either, (1) dealing with this problem together to reach an acceptable compromise, or (2) divorcing with integrity.

So how is that part of it coming along, CeMar?