I mean that's basically what fedimint is. It's an e-cash mint that's operated via multi-sig.
Discussion
Actually quorum is a more appropriate word.
Got it. Need to reread the fedi doc's
Cashu is skipping the complexity of multi custodian in favor of efficiency. Cashu is a system to cover a wide range of applications and use cases...very small vending machine to 10,000 transactions a second. High thruput to reduce delays and complexity.