After I stopped using Windows, I kind of stopped using windows. On Linux (and my current computer, a Mac) multiple workspaces are smooth and easy enough to set up that windows are a pain. I would rather have my applications organized, taking up as much screen space as possible, and accessible with a quick swipe.
In the browser, I have tabs.
The only time I really use windows anymore is to drag things from one folder to another, and even this would not be necessary if Mac's finder had a "view extra pane" option, like Ubuntu's file explorer.
I find windows to be a clumsy waste of space. Agree with article.