Zelle made it through by having various limitations that make it hard for it to displace credit cards, and even that took decades before it happened.
My debit card is branded Visa so it has the Visa Zero Liability protections, and I can raise the purchase limit from $6k to $25k using the app.
Which is why FedNow went live in 2024. In 2025 it already completed processing of $864 billion in transactions in real time.
https://www.frbservices.org/resources/financial-services/fed...
2026 is already looking to exceed $1 trillion in transactions.