Really great guide! That site has lots of useful tips. They’re kept very current and there’s no paywall or ads either.

For your Arch with Cinnamon install, I also recommend this guide.

TIL as well. Biggest disadvantage for me would be not having ~/.config for easy access to most of my config files. ~/.cache is pretty convenient too. My ideal filesystem layout might include these directories but combine the program root directories into one.

The structure of GoboLinux reminds me a lot of Flatpak.