See my reply to reddotX below for the "theory"; in practice, this winds up causing all kinds of breakage when e.g. you are using a "non-default" configuration,

See my reply to reddotX below for the "theory"; in practice, this winds up causing all kinds of breakage when e.g. you are using a "non-default" configuration, and then upgrading fails to change some critical line in a configuration file, and now you have no audio out and must spend multiple hours Googling to even find an error message and install a missing package and start a daemon manually (true story, happened to me on Kubuntu some years ago.) Or you want to use Xrdp to connect to your desktop via Windows RDP, but the default shipped configuration enables the wrong plugin, so you can connect but get cryptic errors when signing in, so you have to edit the Xrdp configuration file and change the plugin load order and then restart X11 while signed in via SSH (happened to me a few months ago, on 18.04 LTS.) Those are just two examples off the top of my head; back when I did use Linux as a daily driver, I would spend multiple hours a month fixing something that got broken or did not work as it was supposed to, and this was just on Ubuntu, not even on Arch or some more up-to-date distro like that.