The important part is that the money lost was the Banks (or the insurance companies - it's unclear). $80m is not chump change, but it also isn't a catastrophic loss which gets passed on to savers.

Of course, understanding the difference between an exchange and a bank is worthwhile - but these guys getting rinsed repeatedly and taking out user wallets is a problem that can't be waved away.

Not quite true. The gang that struck Bangladesh attempted to steal a cool billion dollars. After subtracting the transactions that were caught during manual review at other institutions and the transactions that were rolled back, they 'only' got $80 million. Still a lot but it could have been much worse.

Thieves know there's a possibility the transaction can be cancelled, which is why they tend to strike on Friday afternoon. By the time the theft is discovered the destination account has already been drained.

Do you have a source to know more about this hack?