At the moment i am actually quite a happy 🐧 with Gentoo. While the update "experience" is much worse than everything i know, i think source based distributions are just next-level open source (though compiling is too resource intensive for office computers).
And because my PC is really fast, i let it update every weekend for like 1h or so while i am cooking (food, not myself with the heat of my PC).

There is just one nagging thought always in my mind: What if the istallation breaks, and i am unable to fix it? I will never remember all the changes i made to all the config files, which packages i installed and in which order i installed them. It's going to take months to get to where i am now.
That's why i have been thinking about using NixOS ❄ next time, once Gentoo breaks. The idea of configuring everything from one location and just having to copy one configuration file/folder seems almost to good to be true.
The internet even claims NixOS to be source based, however when i installed it in a VM, the installation was way to fast to be source based.

Maybe i was missing something in the configuration. i will definitely look into it once my beloved current install falls apart.