It's COBOL isn't it?
After reading the first sentence... Yes it is. It's not like this is a surprise. Banks are some of the worst when it comes to actually replacing outdated shit. Until it fails, and takes their entire business with it of course.
These articles have been written for at least two decades now. This isn't a new issue. The banks just refuse to do what's necessary because it is expensive and they want to keep kicking the can down the road. Eventually that can is gonna fall apart, and the millions to upgrade... Will be a nothing compared to the billions they lose daily after.