All of my personal experience with this points to the opposite. Both my parents kept separate bank accounts and had one joint one for bills. I decided to follow the articles advice and simplify to just one and it was the worst divorce my attorney had ever seen. YMMV.
Also, if you entangle your personal finances, I wouldn’t say “staying together” is what your doing, it’s more you are now trapped into supporting the other person (like I was) and they took advantage.
I believe it was a catalyst. Trying to put a budget in place to reduce spending only works when both people follow said budget. When you finally have enough and split finances (keeping the joint account for bills, groceries, etc) it was deemed “financial abuse” in the Colorado courts. She claimed she was being abused and everyone bent over backwards to get her free legal services. It was awful. I’m never getting married again.
Also, if you entangle your personal finances, I wouldn’t say “staying together” is what your doing, it’s more you are now trapped into supporting the other person (like I was) and they took advantage.