It seems the author is using legacy code to mean "bad code I didn't write". My experience with legacy code is that it exists on one server set up by someone who

It seems the author is using legacy code to mean "bad code I didn't write". My experience with legacy code is that it exists on one server set up by someone who left the company 10 years ago, only runs on a particular version of a runtime that isn't available to download any more, and if you run it locally, it makes hard coded calls to the live environment, breaking it. Having a unit test framework is the dream.