One thing I don’t fully understand is the holy war for fast finality in crypto. Visa and Mastercard don’t have fast finality. There is fast authorization + a promise to eventually settle the transaction. In blockchain terms, Visa and Mastercard are L2 sequencers that submit transactions to FedWire and other domestic rails for settlement. Yes, fast finality is ideal, and was implemented in instant schemes such as SEPA Instant and PIX (but not in Zelle). Lack of fast finality introduces credit risks, which cost money. But still…large payment schemes can operate without fast finality. So what am I missing here?