> The point of the whole sub thread is that a merchant can always accept a credit card but still incentivize use of debit or cash by giving a discount.

I was replying to the point made by the parent; it wasn't a meta comment for the whole thread. Most merchants aren't happily accepting a 3% surcharge because it's causing customers to spend more. While that happens and it's a big reason store-branded cards exist, I'd hazard to say most credit card transactions are for the same amount someone would pay with cash and the store just needs to eat the 3% because people don't like carrying cash.

>> Debit cards exist and partially solve the inconvenience of holding cash. But, they're really inconvenient in other ways. > What inconveniences?

I gave an example further down in that paragraph: "If there's a breach at a merchant and my number is stolen I don't have to worry about my checking account being screwed up for however long it takes to sort things out." It doesn't even need to be a security issue. There's been no shortage of incidents where a merchant double-charges, charges the wrong amount, doesn't release a hold in a timely manner, etc. where my cash is locked up with no recourse. To limit such impact, I have a daily spending limit set. That's helpful, up until I need to make a large ticket purchase. I'd love to see a debit card system that addresses these problems.