What is the appeal of a binary-tree only in a tiling window manager (bspwm) vs. nested splits (i3 and sway)?

Bspwm has many appeals, and I do not want to focus on those. I want to focus on binary-tree separation of windows and its benefits vs alternatives. What's the appeal?

For comparison, Sway and i3 allow for the v-split and h-split layout, so you can have 2 or more windows split side by side. You can nest them, so it is sort of an n-ary tree. It feels a lot more powerful.

So why the binary tree? The others seem richer and more capable. Bspwm is marketed as more powerful than i3 but it seems the other way around?