Welcome to BSPWM, you can post your question on this Window manager over here.
Why BSPWM when i3wm already exists?
Not to be confused with, why a VW Beetle when there is already a Ferrari Testarossa.
Easy - bspwm is way less rigid than i3.
Sure i3 is fully usable - and to each their own ofc. I used i3 for a couple of years myself but everything is more intuitive in bspwm.
say you have 2 windows open now you want to put the next one top left in i3
need I say more?
edit: if you dig i3 why not sway? From what I hear it’s fully functional now
I’ve just finished this night a couple of wallpapers for Garuda *BSPWM, I’ll test it out on occasion.