The largest advantage of the Page Object pattern is that it is not a zero-sum approach. That is, we do not need to convert the entire test suite to the Page Object framework to take advantage of it. Instead, we can slowly add new Page subclasses as they are needed and updating the existing tests to use the newly created classes as they become available. For a while, our test suite might look like a hybrid of direct Selenium click methods and the add_to_cart methods from the framework. This is perfectly acceptable as long as our code is continuously improving in the positive direction.