That may be true of recent OS releases but it would be unfair to exclude what is planned for Sierra. Additions like picture-in-picture look very useful. They

That may be true of recent OS releases but it would be unfair to exclude what is planned for Sierra. Additions like picture-in-picture look very useful. They definitely are adding more window management: a “guiding” mechanism to let windows glue together pretty easily, and tabbed windows in any application. Even if they didn’t, you can’t blame Apple for not rushing to provide features like tiling, etc. when there are multiple “tiling” and other window-management apps available on the App Store alone for a few bucks or less. Just go get one, and fix your desktop. And remember, features “never used by you” does not equal “never used by anyone”. Can you not imagine someone starting a message on the couch from an iPad, realizing they need to attach a document that’s on a Mac, and wanting to go get it? Continuity is quite valuable, even if it isn’t used all the time.