There is nothing wrong with using old infrastructure. However, there is something wrong with treating it as a scacred black box. A company using ancient COBOL

There is nothing wrong with using old infrastructure. However, there is something wrong with treating it as a scacred black box. A company using ancient COBOL code should have people who understand it, but also the ability to test it, and to talk to it from new code. Once you get to that point, replacing the COBOL is not so hard -- once you have a reason to do it.