> legacy payments systems have fraud because of deferred settlement
> blockchains have quick finality, wow no fraud
> blockchains do not scale, let& #39;s introduce deferred settlement
> resultant systems predictably face fraud issues

who could possibly have foreseen this?

(not saying it& #39;s not worth rebuilding these structures on a new foundation, but it& #39;s still interesting to point out the journey here)