IMO, anyone with just a joint account is not financially savvy. Its like getting married without a prenup. These are behaviors that people that live paycheck to paycheck engage in. Financially responsible adults with savings have prenups and their own money. It might have been different in 1950 or in 1965 but for the last couple of decades adults are adults regardless of their gender.
My wife and I got married in grad school when both of our net worth's were pretty close to zero. We have no prenup. What kind of things should have put in a prenup to protect either party?
Although I don't agree with
@afox's statement I can totally imagine what a person with a 0 net worth could write in their prenup. A pre-nup is not just about the assets you have at the point of signing it, it's about agreeing how to handle certain situations in the future. Like, how are you going to deal with future inheritances? Are those joint or personal property? What if either of you starts their own business? If that business fails, any joint assets could be accessed by creditors. So it could be smart to keep some assets personal instead of joint. Those are the kind of scenarios that we put in writing.
@kite I totally agree we all need backup plans, but I don't see why that should necessarily be a joint bank account. What's wrong with a regular authorized user? I hope your relative is doing better now. I have chronic health issues so I am definitely aware of the possibility that I may not be able to handle my own money one day, and I've signed the necessary paperwork to prevent it (authorized user + PoA).
@afox my partner and I personally agree with your statement that we're adults and we're responsible for our own money (not the other statements, we were both totally broke when we met, we certainly didn't have family money, and we're doing very well now) It's how we feel about our own personal situation, but this is not a 'one size fit all' thing. Other people make different life choices and in certain circumstances, combining finances can be useful.
However, as
@NotJen example has shown, I do believe people should have some money / cards in their name only so that you do not end up without any kind of access to money. I'm not saying that we should not trust our partners (if there's no trust anymore, it's time to divorce) but I do feel like we should be sceptical of anyone who feels like you shouldn't have money in your own name. I want what's best for my partner so I totally don't mind that he has a bank account and a retirement account in his name only. Yes, that makes it theoretically slightly easier for him to leave me, but if we're at the point where he wants to leave, then I don't want him to stay around for financial reasons.