Not just the foundation, the inventors of Nix and NixOS are Dutch too, it came out Utrecht University. Even the name is from dutch "niks" for "nothing", the snowflake came later and is basically a retcon.

As for practical use, sure there are some rough corners (this is true for every Linux distro), but I don't think there's any horrible showstoppers. In fact it's particularly well-suited for use by organizations (as opposed to private individual use) because it's great for making highly customized but reproducible setups.