Banks have banded together to create Zelle for mostly instantaneous payments for individuals. As far as transactions between individuals, moving money quickly is a solved money. As for moving money from individuals to businesses, taking a long time gives customers more "float" and more time to earn interest, and it is a feature not a bug.

There are other issues to consider in the payments world. For example, I may not want my payment data to be used for marketing purposes[1] or have my payment processor block my steam purchases[2]. I'm skeptical that Stripe will deliver on those gaps though.

[1] https://www.gao.gov/blog/why-do-banks-share-your-financial-i...

[2] https://www.thegamer.com/paypal-not-accepting-most-currencie...

Banks banded together to create Zelle to offload most fraud risk onto individuals.

They used "mostly instantaneous payments" as the carrot to get those individuals to use the service.

Banks have near zero obligations around Zelle transaction fraud - if they do anything, it's often mostly as a goodwill gesture for a customer.