One would expect banks and the Fed to eventually adopt similar infra that Europe is (per this submission), where card infra can use these Instant Payment ("FedNow") rails for C2C, C2B, and B2B payments (although, eventually, everyone will move to QR codes a la China; Zelle is beta testing QR code support for instant payments on their network [5]).
US payments currently suck, but I wanted to share that progress is being.
[1] https://corpgov.law.harvard.edu/2020/08/31/fednow-the-federa...
[2] https://www.pymnts.com/news/faster-payments/2021/five-banks-...
[3] https://www.frbservices.org/financial-services/fednow/blog/u...
[4] https://www.frbservices.org/financial-services/fednow/instan...
[5] https://www.zellepay.com/support/how-do-i-use-zelle-qr-code