Uhm, the EU already has free instant SEPA transfers? I use it regularly, sadly not all EU banks support it (smaller ones sometimes have issues and have to resort to standard oldschool 2-day transfer, but they are also free).
But I honestly don't know many people with a CC here, and those who do (myself included), we don't have the same advantages/disadvantages of a CC: no points, no "free" miles, no interest and no possibility to rack up debt like in the US since Visa automatically deducts the full amount from my bank account at the end of the monthly billing period.
Non-Euro countries won't be guaranteed to have it until July 2027.
SEPA instant transfers aren't guaranteed instant as they might still be withheld for fraud checks.