[memracom]

Lots of these guys learned new languages like C aeons ago and have since moved to Java, Scala, Python, etc. The folks who are stuck maintaining legacy COBOL apps are there because they want to be there. The very competent people quickly learn how to use new tools, but can still deep dive and find bugs related to memory leaks and race conditions when it is needed. At the same time, these old guys are likely to demand that everyone around them use TDD so that they don't introduce that kind of bug in the first place. Case in point, Uncle Bob.