It's important to understand that Facebook is incredibly large, and the fact that any software scaled with them to the point they are presently at, is a "on the shoulders of giants" situation that seems to actually be working well enough for them to become a billion dollar enterprise.
Also, the building of infrastructure that takes on scale that's not yet been required is somewhat inefficient. But it does beg the question: If Facebook is limited by its infrastructure, what responsibilities do they have to build software that continues to scale for future organizations?
Also, the building of infrastructure that takes on scale that's not yet been required is somewhat inefficient. But it does beg the question: If Facebook is limited by its infrastructure, what responsibilities do they have to build software that continues to scale for future organizations?