Being a Canadian I have always been surprised at how limited debit card use at retailers is in the US. Part of it is due to my card being from Canada but it also has to do with the antiquated system of fees for using the interchanges.
I assume this post was down-voted due to the "fed" being political. I find the topic more interested in that it is a field/service that needs disruption. Too bad it was a government policy change that had to do it.