In my experience actively maintained but not heavily modified applications tend towards stability over time. It don't even matter if they are good or bad codeb

In my experience actively maintained but not heavily modified applications tend towards stability over time. It don't even matter if they are good or bad codebases -- even a bad code will become less buggy over time if someone is working on bug fixes. New code is the source of new bugs. Whether that's an entirely new product, a new feature on an existing project, or refactoring.