> in SEPA, that offer instant and irreversible settlement at zero cost.
Note that SEPA is 100% not reversible. In fact, if you look at the scheme terms is absurdly reversible. There's a 8 week no questions asked refund window, so (for instance) one could pay your mortgage with SEPA and then automatically undebit their account up to 8 weeks later.
(Don't do this unless you're happy losing your property, not financial advice).