Then you're just locked into the mint... eCash is even worse custodially... There is no way to verify mint holdings because of the privacy aspects.
Discussion
dont agree, ecash mints are, in the worst case, on par with typical (database-based) custodial.
If things go well there are a lot of benefit added.
You can be locked in a mint with some of your liquidity, but your multi-mint wallet still works fine with most of your liquidity. And your payment are private.