FYI, AutoHotKey on Windows is a much better (my opinion) version of Karabiner, with it's own programming language. It's quite amazing what you can accomplish with AHK: it goes well beyond key mapping to process control, building quick utilities or quick mini GUI applications, compiling those into executables that you can share, etc;

See https://www.dcmembers.com/skrommel/downloads/ or https://www.autohotkey.com/docs/scripts/ for a larger collection.

For example, I would have never thought of AltEdge ("Sends Alt-Tab when the mouse is on the left edge of the screen and keeps cycling through the windows") or Barnacle ("A programmable toolbar that fits inside any window") or MonitOff ("Turns off the monitor at user defined idle times during the day") but it took 10 seconds to download the executable and try out one of these (AltEdge).

https://www.dcmembers.com/skrommel/download/altedge/

For me, Windows' programmability, especially AutoHotKey, has been a major reason to find Mac OS rather unattractive. Over the years, AutoHotKey has solved several minor-but-daily annoyances for me.