this doesn't really answer anything. where is the state stored? a single server managing all exchanges can't correlate payments? what if most users only send/receive sats from outside the mint?

yes I know how blind signatures work. I don't like sidestepping the traffic correlation issue. even harbor wallet recognizes this.

is it just the privacy and accounting? are there other reasons to use ecash? how seamless is the lightning-ecash convert? or swapping ecash between mints?