[briantakita]

> Obviously you benefit from understanding the internals too, but realistically, the more complicated the thing you're using, the less of the internals even a motivated user is going to bother with.

This is a problem that grows with a large library...An api change has a higher cost than with a smaller library. Smaller libraries also tend to be easier to fully understand. Large libraries tend to be more of a "leap of faith" than small libraries.