Sticking to family court, everything drags out in the US if you have the money to keep funding it. So if you get two people who have different things and can afford lawyers, it goes on. It never really ends until the children are grown. Even if some arrangement is made, a party can go back to court to ask for a change.

I am not an expert on this, and I've never been divorced. I just know people from various things, including family.