
Not an issue for regulators.
I can understand (and would expect) that an IT industry trade association would suggest that the solution involves buying more hardware and software.
The management of the banks are (or should be) in the best position to determine if their systems are fit for purpose. The "purpose" is to support business processes, provide "customer service" and address requirements imposed by regulation. Whether these requirements are met by 30 year old mainframe based systems or brand new kit is not really the issue.
Regulators should not be telling businesses how to configure their infrastructure. [If they do, then I can't wait for the reaction from the water companies when they are told to replace the Victorian pipes and sewers]
(Old joke warning) Q. How can you tell when a salesman is lying? A. His lips are moving!