I used i3wm for years at a previous job, and my new job's policy is Mac OS only (everyone has a price). I use yabai as a replacement but it really is a hack. It works great, and I much prefer it over the suboptimal window management shortcuts/techniques that macos provides. However, it is much slower than i3wm, which is a lot more native than yabai which is a scripting layer over window management.

I really wish MacOS would just open up.