My wife and I have only used credit cards since 1998... And it is working well... only one invoice to pay at the end of the month. You get a detailed report/invoice of everything you spent. My credit card gives me back 2% on all purchases. Yes you have to pay it off every month to avoid interest, but that is a good thing.
I have paid for funerals, cremations, college tuitions, property taxes, new cars, everything and anything on a credit card. Right down to 50 cent packs of gum...
I do carry two cards with me at all times, as I have had my credit card numbers compromised ... wait for it.... NINE times in 20 years.. However I have never been responsible for any wrong charges.
I love credit cards... Cash is evil... and you never know where them stinky dollar bills have been jammed into...