To give an example, with fintech businesses utilizing payment functions provided by banks through an open Application Programming Interface (open API), moves to innovate customer services as well as develop a convenient and comfortable user experience are growing increasingly common. Shifting our focus to overseas, various stablecoins circulated on permissionless blockchains are emerging.
This can be considered an unbundling of two payment functions: one for issuing liabilities, or put differently, settlement assets, and the other for recording interest in settlement assets. This unbundling also applies to "programmability," a popular term these days.