My (admittedly limited, so far) experience in the financial industry has indicated that, while it is the norm is to use settlement and reconciliation in situati

My (admittedly limited, so far) experience in the financial industry has indicated that, while it is the norm is to use settlement and reconciliation in situations where making ACID-style guarantees is impossible, ACID-style guarantees are most emphatically _not_ foregone when it isn't necessary to do so. One big reason for that is that the settlement and reconciliation process is easier to manage when the parties involved can at least be confident that their own view of the situation is internally consistent. Gremlin-hunting is a lot less expensive if you can minimize the number of places for gremlins to hide.