The perfect CMS to suite the needs of any non-trivial content-oriented website does not come out-of-the-box. They require customization. For instance, a feature article for a news site isn’t just a title and content anymore. It’s a title, optional subtitle, alternate short title, blurb, full content, related articles, featured image, optional featured video, and optional slideshow/slides. If your CMS can make those fields available on the entry screen, that’s a recipe for success.