In my opinion OO design is valuable in extremely large code bases and/or code bases that will likely exist for decades and go through multiple generations of si

In my opinion OO design is valuable in extremely large code bases and/or code bases that will likely exist for decades and go through multiple generations of significant refactoring. With respect to your setters and getters question, particularly in regards to Python... The @Property feature in Python is just a specific implementation of the setters/getters OO design principle. I can easily be convinced typing foo.x is better than foo.getX(), but I have a hard time having a strong emotional reaction to one vs the other if the language allows them to have the same benefits.