This point made me think for a while... We're so used to languages with batteries included, like for instance Python which I often compare to Lua, that we assume it's always a good feature to have. It can be, but it's not for free. We definitely become a bit lazy and often turn more into "library users" than coders. It's convenient at first sight, nevertheless a bad habit. There's so much we can learn by implementing our own versions of even the most simple algorithms. In addition to that, our solution is probably going to be leaner, even if not as feature-rich, than the library next door. But then again, we probably don't need most of those features.