@distrotube neat! I'd used chunkwm on MacOS for work and it was modeled after bspwm, so I've held a similar impression to yours with bspwm.
Going to miss your series on window managers! Wish you could have snuck in ratpoison since it seems to be one of the oldest (circa 2000) and what I used ~10 years ago, but definitely understand the desire to stick with something - probably qtile!
Have you thought about doing a retrospective on the different window managers and providing a personal ranking of them?