In a perfect world, I’d agree with you. The author of the article you linked to provides a good answer to this problem: If your audience is architecturally

In a perfect world, I’d agree with you. The author of the article you linked to provides a good answer to this problem: If your audience is architecturally minded and aware of REST, you should version data representations in the MIME types your application accepts. If your clients view the URL as the most important facet, make the URL the center of your versioning efforts. Folks who are familiar with versioning with WS-* Web services tend to be more comfortable with changing the URL when versions change.