gistfile1.txt

5-10 KLoC is an important waterline. In a 500 LoC throwaway, it's easy to juggle strings back and forth between loosely structured dictionaries and barely organized arrays while keeping mutable global state in randomly picked places and still get away with it safely1. 5-10 KLoC is when such soup becomes unmanageable and that's when author begins to shape it into crisp domain objects and clearly defined design patterns. 
 
-- http://antiblog.geekyfox.net/entry/proper-typing