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I never got why credit cards were such a big deal for consumers...For me, it's always been about that buffer between my actual money and the merchant. Sure, credit card rewards programs have been great, but having a middleman who is more or less on my side in all financial transactions is a game changer.
If I use my debit card, the money is out of my possession; it's possible to get it back, but it's not certain, and while I'm waiting for that to happen, I don't have access to that money. (And if I use cash, I pretty much just have to accept that the money is gone the second it leaves my hands.)
If I use a credit card, I still have the money, and can dispute the charge. Even if I don't notice the problem until after I pay my credit card bill, I still have a single entity (who, again, is more or less on my side) who will refund my money if I have a valid complaint, even if the merchant isn't playing ball or is a fraudster.