If you're not familiar, the Atomic project is really interesting. Its focus is stability and reproducibility, trying to solve the fragility that can happen when the default way to use software in Linux is `sudo apt-get install`.

There's a community offshoot called Universal Blue (after the original Atomic image Silverblue). It uses the standards set for containerization to make userland configuration reproducible as well. There's a manifest (Containerfile) that enumerates all the modifications, which means an upgrade is bump the version of the base image and replay all the modifications from the manifest. It's also meant to limit `sudo` usage, so you're not in the habit of giving root to random software you downloaded from the internet.

Their most famous image is Bazzite, which will replicate the SteamOS experience on generic hardware. They also have Bluefin for software developers.

I haven't used it myself, but I find the concept fascinating. I expect Jorge and Kyle from that project will find their way to these comments.