> You realize that mainframes aren't just for running 40-year-old COBOL applications, right? > Pretty much any code you might write, including that written in

> You realize that mainframes aren't just for running 40-year-old COBOL applications, right? > Pretty much any code you might write, including that written in the hippest, trendiest, fad-of-the-week language, will run on top of this "risky ecosystem". Nobody has presented any compelling arguments as to why a business would want to do this. Why would I ever want to learn about z/OS as a developer? And if we're not using z/OS, and we're using Linux on IBM Z instead (which doesn't work without virtualization), why would I not just deploy to VMs/Kubernetes/other x86-64 or ARM based machines? It'd certainly save on the licensing costs!