That looks cool and/or terrifying. How does it go usability wise?
It's quite usable, but like anything could be better. I run GuixSD as my daily driver OS on a laptop and desktop and it's very comfortable for my needs. OS upgrades can be easily rolled back in case I screw something up so I feel more confident to experiment with my system.
How does it compare to say Arch?
[0] https://www.gnu.org/software/guix/