Yes, the scale at which you notice problems with older code changes as you gain experience. i.e. you may have it down at a function or class level but then, at

Yes, the scale at which you notice problems with older code changes as you gain experience. i.e. you may have it down at a function or class level but then, at a system design level, or perhaps in the way that the code addresses business needs there will likely be improvements that you can see given the benefit of hindsight and experience. [edited to remove typo]