Switzerland is restrictive with naturalization. You can be born here, have spent your entire life here, and still not have citizenship.
Due to bilateral treaties, immigration from EU countries is quite easy nowadays, but for citizens of non-EU countries, far less so. Almost 90% of resident foreigners are European: https://en.wikipedia.org/wiki/Demographics_of_Switzerland
It was super easy for me to get a working visa to Switzerland when I had a job there, and I’m not EU. Anecdata for sure, but I was hardly the only non-European around. There were even plenty of war and economic refugees around, far more than I ever encountered in the states.
Due to bilateral treaties, immigration from EU countries is quite easy nowadays, but for citizens of non-EU countries, far less so. Almost 90% of resident foreigners are European: https://en.wikipedia.org/wiki/Demographics_of_Switzerland