Visa, etc definitely, but payment processors at the end don't care. They can add a new method without a hassle.

This is only existential for credit card companies. So they definitely would do anything to survive. But the monopoly they have, and the high fees they charge are ridiculous. This should be challenged at least for fun.

But I see the need for an alternative from merchant side.

Lightning seems good alternative for them: instant, low fee, no chargebacks.

Vs credit cards: at least 3 days, high fees, costly chargebacks.

Also from payer sides, you don't know how much data credit card companies have on you, which is...