The real value is parameterized logging, sanitation of sensitive strings, logs per module, and automatic contextual value adds like function name, parameters, l

The real value is parameterized logging, sanitation of sensitive strings, logs per module, and automatic contextual value adds like function name, parameters, line number in the source code. Sysout is good for simple stuff, but a healthy set of audit logs (IE after every branch, and essentially replacing code comments with log statements) really cuts down on time needed to debug production problems. > This is not in the business perimeter, but the ops perimeter. That is a great point. Logging configuration should be provided at runtime, not compiled into the application. That's why most places provide the logging configuration as a runtime parameter.