Banks too big to fail ...
but these banks have IT systems that are too big, too complex and too old and getting worse with an increase in the probability of major failure. It's not a question of 'if' now is it?
Banks are, as Trump would have it (or not), are of national security importance- global too. The IT systems of these national security entities do not appear to be seen in a similar vein.
It may be time, before a bank merger is allowed to go ahead, the 'proper' authorities look at the state of the parties' IT systems and any plans to integrate those systems over a period of time. I know, I'm dreaming.
Biting the hand that feeds IT
