Library Knowledge Depth

There are no small libraries, not anymore. Actually, come to think of it, there are small libraries, they just aren't used by the application developer these days because the tools employed tend to be all-encompassing. That's the attempt anyway, and with valid reason too — I'm not going to like using toolkit X because I can't do Y. To do Y, I need toolkit Z. The less variability in the dependencies of my application, the happier I am as a developer. This over-arching attitude of mammoth libraries, however, creates a knowledge problem. The library tries to solve so many problems, that its size grows beyond what can fit in any one developer's head.