Niri convinced me Scrolling is The Way.

I really want windows to be able to span columns. So if I have 1 column with two windows and focus on the bottom window then create a new window/column to the right, I want that new window to be on the bottom half of column 2. I want the window from the top of column 1 to stretch across columns 1 and 2. If I again create another window/column to the right, that top left window should stretch across columns 1-3. So I should have one very wide window across the top of the screen and 3 windows across the bottom.

I've started playing with this idea in the hyprland hyprscrolling plugin but I'm kind of an idiot and don't have much free time these days.