For what it's worth, I have paid for nearly everything I possibly could with credit cards for decades, and I haven't paid a cent in credit card finance charges in at least 15 years (since my fiancee straightened me out and helped me see that I was being dumb about debt). I have them set to auto-pay the entire balance every pay period.

I use them because consumer protections with other methods aren't as good here in the States. Paying with a credit card, if I have an issue with a vendor, after a good faith effort on my part to resolve the issue, I can just ask the credit card company to deal with it. (I don't abuse this, but I don't doubt there are people who do.)

There are better and worse credit card companies for this. American Express has great customer service but they aren't accepted in as many places.