Well, let's refine that analogy a bit. Legacy code being used by BILLIONS of users, where even a single critical error is viciously excised. Non working code =

Well, let's refine that analogy a bit. Legacy code being used by BILLIONS of users, where even a single critical error is viciously excised. Non working code = death. So while it isn't clean, it is functional and relatively bug free. I do stress the relatively part.