All of the reasons they give for free software (or more specifically mentioned in the article, "gnu software") apply to good ol' open source software too (which is free as in free of FSF dogma & rms).

Let's look at the reasons:

> free software gets the whole community involved in working together to fix problems.

> developers really care about reliability

> an author who makes the source code available for all to see puts his reputation on the line, and had better make the software clean and clear, on pain of the community's disapproval.

The injection of [GNU/] in the quote is pretty funny too.