I realize everyone has their own system of working their financing with their spouse.
My grandfather came home and handed his barber money to my grandma every day. She managed their rental duplexes, and all of the household money.
My mother and father did it jointly.
My in-laws had separate accounts: his and hers. They also used the envelope system for keeping track of bill payments. They kept their pension checks separate. The did well for themselves. Mom still cashes her pension check monthly. She will not switch to direct deposit.
Wife and I are merged accounts. I no longer write checks. I may have taken cash from the ATM machines 3-4 times last year. Otherwise, everything on the debit card. I always give her the receipts out of habit, but she balances on line so doesn't really need them. If I'm going to spend over $100 on something, I always ask her if there's enough in the account first. She laughs at me and says "Yes dear." I think I do it just out of courtesy at this point. About once a month we jointly stare at the bank statements on-line just to stay on the same page.
My brother in-law and his wife have been married around 25 years and still do completely separate accounts.
To each their own, I guess. All of us are/were still on our first marriages, so something's working for us so far.