Because it's better than nothing at all. And way better than VSS, which what the target audience of this article is probably using.
What's a better open source version control system that integrates into Visual Studio?
As far as I know there are SVN-compatibility layers for a lot of version control systems to leverage existing SVN-integration.
Do you have any suggestion? I don't know anything better then SVN :(.
A lot of people nowadays are moving to Git (http://git-scm.com/). Although to be honest, I'm not sure if Git would be a good fit in a Windows development environment.
Thanks, I will give it a go asap. Never try it before.
Bazaar (bzr) is also worth a try. I used it before git.