Code quality means different things to different people. For some means applying the most obscure design patterns known to mankind and several layers of abstraction, for others it means Uncle Bob's teachings + GoF patterns, for others it means having pure functions everywhere, for others it means sticking to a strict style guide, for others it means following a particular set of conventions, for others it means writing readable and code, for others it means writing composable code, for others it means writing modular code, for others it means a mix of some of the above.
