Responsive design has to be used with a purpose. Not every site should display the same content across all devices.
Mobile visitors often have a very different set of objectives for visiting your site. In those cases, merely squashing content to fit on a smaller screen isn’t particularly helpful. Instead, it is important to consider how different contexts change the content that users want. —Ditching responsive design
Contrary to the opinion of the article, responsive design should be considerably cheaper if done properly.