NixOS "solves" this, albeit with a pretty archaic configuration language and deep buy-in. The end result is that I now keep a Git repo with 95% of my Linux config represented as modules. Then I install each module as-needed (eg. terminal.nix for terminal config, desktop.nix for desktop config) for the devices I use and rebuild it with that set of modules.
Works great, even with my laptop, desktop and server sharing the same config. Versioned rollback + nixpkgs has kept me happy for about 4 years with this setup.
Works great, even with my laptop, desktop and server sharing the same config. Versioned rollback + nixpkgs has kept me happy for about 4 years with this setup.