One of the overlooked challenges with modernizing a system that includes the mainframe is how to tackle the applications that are not native called supporting apps. These applications are relatively easy to port or are cloud native. They have been written to benefit service-oriented architecture, horizontal scalability, or leveraging data that may be otherwise difficult on the mainframe. Typically, they augment the resources in the cloud to provide the agility offered by CI/CD and its support for horizontal scalability.
