I’m not personally a fan of immutable distributions myself, and I’m definitely not really a fan of recommending one to a new user. Most of the solutions for problems that someone may search for on the internet are going to assume that you are not using an immutable distribution and will not help that user what-so-ever. I also really don’t want to have to teach someone who is already worried about moving to Linux about things like distrobox, Flatpak sandbox permissions, why they can’t modify certain files, etc. I think it’s counter productive, and will just play into the “Linux nerds need to run 500 commands just to install 1 app in their distrobox container and modify their Flatpak permissions so they can mount their external drive with their games on it in Steam” mindset. I just want to give them something that works, and will work most similarly to what they are used to. Honestly, this is why I’ve strayed away from Linux in general over time and went back to NetBSD, I want my things to just work, I want it to be simple, and I don’t personally have brand new hardware so all the modern amenities that Linux offers to me don’t entice me.
I know this is a joke post but… those floors are usually mechanical floors where equipment is mounted and instead of windows they have a steel corrugated mesh covered by louvers to allow air to flow through them to cool the machines.