I would assume ones's parents divorce would be much easier to come to terms with for someone in their 40s compared to 20s, teens or kids (that doesn't mean it wouldn't suck).

my parents split and got divorced when i was in my 20s, and both of them had remarried within about 5 years. it didnt really bother me very much at all, i was already living very far away from home, and its good to see theyre both happier than they were before the divorce. the biggest change to me is i have to visit two houses when i go home for a holiday instead of just 1 house