tests you put in the code don't do a constant move forward so we also can experience where new user stories are just arriving arriving arriving and you didn't manage to have time for optimization I don't mean just a small organization when you are solving some visible technical depth where you put something to commit to do and then you find some time in the next sprint to fix it I'm talking about getting the overall picture seen so as developer I learn everyday I find some blog I find some new technology so because of the move forward so six