We have one bank account. I manage all the money. I write all the checks. She does not have access to the account. My wife does not have money management skills.
We use a joint budget and discuss where money goes after the basics (housing, utilities, food, some medical)
My parents always have had two accounts and it has made it easier on both of them. They have very different styles of managing money and would find it extremely difficult to work a joint account. My father writes my mother a check to augment what moneys she gets each month to help cover which bills (and luxuries, such as gifts for the grandchildren.) she covers.