depending on what you do there are large benefits, for me they are executable code blocks (i.e. jupyter like experience) and way better latex support (if you type equations that are more involved this is rather important).

Hmm thats strange, nautilus is definitely themed for me, apart from symlinking and setting the general gtk theme, I think the only thing that I did in addition is setting the following in settings.ini

[Settings]
gtk-application-prefer-dark-theme=true
gtk-icon-theme-name=Papirus-Dark
gtk-theme-name=Catppuccin-Macchiato-Compact-Mauve-Dark

For me cattpuccin also works with libadwaita apps if you symlink the config in gtk-4.0 folder of the theme to .config/gtk-4.0 or is it something more than the colors you are missing for libadwaita apps? 🙈