Sure. We have a codebase and app stack that has grown over 40 years. Responsible Parties have come and gone, sometimes handing off ownership responsibly, but of

Sure. We have a codebase and app stack that has grown over 40 years. Responsible Parties have come and gone, sometimes handing off ownership responsibly, but often there wasn't enough time. So someone may be "responsible" for application X, but they haven't looked at the code in any detail. Or application X was installed by a vendor who provided documentation back in 2002 that is long gone. Nothing is trivial in large organizations.