Nix on non-NixOS distributions would be great, if it would support installing apps into the users home directory instead of a global directory (without recompiling everything).
(When I looked into it, it wasn’t possible, but if you made it work, please share.)
There are two kinds of freedom, negative and positive liberty. US has a lot of negative liberties, they dictate little in what you can or cannot do, but is lacking in positive liberty, they don’t support you very well to do what you want to do.
While Europe might have less negative liberty, their generally better social welfare system grants people more positive freedom.