You’re missing the whole point of an immutable distro. If you have a hobby project on a regular distro, you run apt-get update or whatever, it installs 200 packages and half of them run scripts that do some script specific thing to your machine. If something goes wrong you just bought yourself a week’s worth of debugging to figure out how to roll back the state.

If you update using an immutable distro, you rebase back on to your previous deployment or adjust a pin and you’re done. Immutable distros save you tons of time handling system upgrades, and the best part is you can experimentally change to a beta or even alpha version of your distro without any fear at all.