> The subtractive Grid model starts with a three column grid and allows zones to be created by splitting and merging zones, resizing the gutter between zones as

> The subtractive Grid model starts with a three column grid and allows zones to be created by splitting and merging zones, resizing the gutter between zones as desired. i3wm is basically like that except ad-hoc instead of preconfigured, and starting from a single full-screen window.