That was directed towards your question about paper cash "Why go through the trouble when it's easier to use the ATM?"
>"there"s no pointbin being sovereign if your money loses value over the long run."
Of course there is. Especially for large amounts of money. Why would you take on additional counterparty risk when you don't have to?
Cashu is custodial. It's not a replacement for Monero (non-custodial). Different use case, different advantages. Here it is from the creators own mouth: