[lxgr]

> That surprises me, I've never met someone that uses Debit cards as their primary method of payment.

That in turn is not surprising – the split is very much correlated with socioeconomic status (to the point where quite a few of the people working on debit card products have never themselves used a debit card to pay, in my experience).

> The only drawback to credit cards is the interest [...]

Which is a significant drawback if your bank account balance regularly oscillates around zero and/or you've seen your peers get in financial trouble from credit card debt.