While i agree with the first four points, the first sentence of the "use ruby" bit could not possibly be any more wrong. To quote:
> As you start writing code and realizing how powerful it is you will never want to install anyone else's crappy module again!
This stands directly in opposition to the DRY principle, which applies to ANY language, not just Ruby. As you get more experienced in developing software you end up using more libraries by other people, because you are easier able to figure out which ones are good and which ones aren't; and also because you're more comfortable with figuring out foreign APIs.
