But KDE allows all this _and_ allows windows to overlap. There are keyboard shortcuts for "take the left half of the screen" and "move focus to the window left of this one". How many windows does a typical i3 user have open anyway?
For tiling terminal apps, I just use the tiling feature of KDE's Konsole, and used to use Terminator.
For tiling terminal apps, I just use the tiling feature of KDE's Konsole, and used to use Terminator.