That doesn't matter. Only growth of manpower matters. The fundamental problem stays the same regardless of how many people you have. If you add code and revise

That doesn't matter. Only growth of manpower matters. The fundamental problem stays the same regardless of how many people you have. If you add code and revise 50% of it every month, the code base is bound to grow and the share of time spent on maintaining the old code grows as well until development of new code grinds to a halt. Unless of course there is massive growth in hiring. But that isn't sustainable. [Edit] Well, I forgot one possibility: Deleting code.