Cards are reliant on US companies -> Visa / Mastercard. The European Payment Initiative wants to remove reliance on the US. Perhaps there can be a ECB payment rail/network that would support cardlike payments too.
It's not really nationalism since this is a European effort across multiple countries. But for all of them, it will improve the national security posture.
The only superior aspect of Visa/Mastercard payments is that they are more widely accepted, and that's something that can be changed.