Ask HN: Anyone here using Karabiner on macOS to remap keyboard?

I found Karabiner tool to be really life changing with how I approach working on macOS now.

I have made every key on my keyboard into a modifier key, to the point that I never even use cmd/opt/ctrl keys any more as I use my `a` key as ctrl key instead or `e` key as cmd.

I wrote about how I use Karabiner in more detail here: https://wiki.nikitavoloboev.xyz/macOS/apps/karabiner/karabiner.html

I am curious, if anyone here uses Karabiner tool too in this way? Or if anyone here uses some other keyboard customisation tool.