I tried kinto on Pop about a year ago and it worked pretty well but conflicted with their workspace and tiling key commands so never tried switching to it beyond a single days worth of preview.
It felt like Pop_OS! went out of their way to rewrite the own custom installers and then just decided not to support btrfs for whatever opinionated reason? I dunno - but it made me rather unhappy with the situation and I switched back to my Ubuntu Budgie distro of choice. Sad - because I would have dog fooded Kinto.sh seriously on Pop_OS! had they supported btrfs properly w/ snapshot support. Most Ubuntu based distros don't change the installer so much that proper btrfs support is broken.
I do support them though and may purchase one of their laptops in the future and sure - I would love to work for System76 - despite not yet using their OS on anything besides a VM. I do think they get a lot right, and love that they open sourced their BIOS for their laptops. We need more companies like them selling Linux pre-installed.
https://github.com/rbreaves/kinto
The proper way is remap the modifier keys and then remap further based on the app on focus. Gives you coverage whether you explicitly remapped an individual app or not.