A new change or feature is about to be implemented. There are several places where it can fit in, and all of them seem to respect the Single Responsibility Principle. My tendency used to be adding the new feature where it was easier to place. However now I consider other criterion. I ask myself this: If I need to navigate through the code base a bunch of months later to read the feature implementation... where would I look at in the first place?
Lesson: once you make sure your code is going to be SOLID, add the new feature in the place readers would expect to find it.