I guess tiling window managers should be considered more of a specialized niche tool, and in that it is commendable that i3 does such a good job of it. I do really admire it for being so light-weight on resources compared to a lot of the other more popular WMs. I say a niche tool because I've never really understood why someone would prefer a Window Manager that places a lot of constraints than one that lets you cont…
Like "pro" apps, every IDE I can think of has their own UI conventions, eschewing their host OS. All I see a tiling WM doing is extending that to the whole OS. Tiling WMs IMHO are great at avoiding the mouse and strapping together your own "IDE" whether that's tailing a log while looking at code next to it, or looking at a result in a browser.