NixOS. I’ve been running Linux since Slackware 1.0, since then have run Debian, LFS, RedHat, CentOS, Gentoo, Arch and Ubuntu. After years of Ubuntu I discovered NixOS and after diving deep into it, have never been happier with a distro. All of my machines and dot files are in a straightforward single language in a git repo. The mutable parts of all my applications are nicely isolated and backed up and I can make changes to my systems fearlessly. It has a very steep learning curve, but it’s amazing.

The control and deterministic nature of it is amazing. I have a git repo for all of my machines entire config. I have no fear that installing something will break or make things that would require blowing away and reinstalling. Also blowing away and reinstalling is no big deal, as is building new boxes. It has a high bar for learning to use it effectively, but the view is worth climbing the mountain.