(In French.)
That could be a massive hassle for American tourists, who will still mostly have Visa and Mastercard. I'm sure that there will be some kind of solution -- I suspect Google Pay and Apple Pay will support the new network. But I'll have to keep an eye out.
I might even have to start bringing cash. I used to make that the very first thing I did on landing. The last few times I didn't get any cash at all.