It's not all-or-nothing. Just because you use a tiling window manager and like to operate it with the keyboard doesn't mean you can't use your mouse any more.
I used to use i3, and I used Firefox for browsing.
I used the keyboard to layout the windows where it was more convenient, but I clicked on buttons with a mouse when that was more convenient.
I now use the standard Ubuntu setup, not for any particular reason, just because it's the default. I often miss being able to conveniently layout terminal windows with just a few keystrokes. Trying to keep terminal windows neatly tiled with a non-tiling window manager is so annoying that I don't even bother.
That makes perfect sense, of course. The way the author speaks about that setup could make someone guess that he does everything in text mode. It would help to add information about those other user cases in which the mouse and a visual app comes forward.
I used to use i3, and I used Firefox for browsing.
I used the keyboard to layout the windows where it was more convenient, but I clicked on buttons with a mouse when that was more convenient.
I now use the standard Ubuntu setup, not for any particular reason, just because it's the default. I often miss being able to conveniently layout terminal windows with just a few keystrokes. Trying to keep terminal windows neatly tiled with a non-tiling window manager is so annoying that I don't even bother.