[thgaway17]

Unfortunately, my marriage resembles that of your parents. My only counterpoint to your belief that they would be happier if they divorced, is to suggest you may be minimizing they value they get from stability and certainty.

There’s value in knowing who’s going to care for you when you get cancer, even if there’s a lot of animosity now.

[valarauko]

I agree, though context is important too. Getting separated at 80 would likely mean a severe drop in their quality of life, for the remainder of their days. Getting separated at 50 much less so, especially for the man (usually). At 40, the perceived value of that stability and certainty is probably not worth the unhappiness.