ISO20022 is a message service like texting the process of settlement remains the same old way, Trust between banks each bank has to have equal value to move currency. On demand liquidity is the future it eliminates trust between banks instant settlement which is what Xrp will be used for. Currently In testing phase everything is ready just waiting on mass adoption. I imagine a big event happens to adopt it seeing governments are in control seeing they look like heroes to the people given the knowledge we now know how things operate. God Bless