One thing I really don't like about rectangle (and maybe MacOS in general) is that you can't easily multi-key hotkeys with regular keys. So for example CMD + Right Arrow + Up Arrow for upper-right tiling. This is simple/trivial with PowerToys on windows. But you can use Karabiner Elements to create a simulation of this using keypress delays. I use Karabiner + BetterTouchTools to accomplish the same functionality since I'm already running it for other reasons.