I heavily use AHK to make my Windows 10 an enjoyable and keyboard focused environment. Between AHK and an hardware keyboard with full keyboard macro's, I have Windows working with my Macintosh inspired keyboard bindings.
Of course on the Mac, I heavily use Keyboard Maestro and LaunchBar so I am really implementing my own keyboard centric UI
Do you use one? Which? I used one, very convenient, in eighties(!) and haven't seen something comparable since.
The functionality I had then that I liked was: any key could be programmed to really anything else (except the special "macro" key) -- another key or another sequence of the keys, and I regularly did some action once, recording it with just one "start recording" and one "stop and assign to.." action and after that just "playing" it when needed. It was a huge time / nerves saver at these times, especially because it was fully independent of the programs and even of which OS I've used (I've had to switch between two even then).
I'm not the parent, but I use the Kinesis Advantage and it supports macros. Basically you can rebind any key to any other and also bind any key to a sequence of other keys. I think you can also change the timing of each key press, but I've never used that feature.
Of course on the Mac, I heavily use Keyboard Maestro and LaunchBar so I am really implementing my own keyboard centric UI