kanata is basically like QMK for any keyboard without the firmware requirement. I use kanata with my trusty old iMac keyboard which is to this day my favourite keyboard of all time. But now I have all the cool QMK-style layers with it.
So that is awesome on its own, but where it gets even better for me, and this is where the seconds have really added up to hours, is that I wrote another piece of software which programmatically changes layers on kanata whenever a different window is focused in my tiling window manager.
This has honestly changed -everything- for me. I no longer have to waste keys on my keyboard to switch layers, I no longer have to -think- about switching layers, I just focus another window with alt+hjkl and whatever keyboard layer I expect for any given application is automatically applied. Definitely one of those "you can never go back" experiences for me.