You can be grandfathered in, but since this was about somebody returning to Europe, it likely doesn't apply to them
Again, depends on the country. Switzerland (which I appreciate is not in the EU) does not require visas for many "friendly" 3rd countries even if the person is coming to work.
https://www.sem.admin.ch/sem/en/home/publiservice/weisungen-...
alt Hacker News
Again, depends on the country. Switzerland (which I appreciate is not in the EU) does not require visas for many "friendly" 3rd countries even if the person is coming to work.
https://www.sem.admin.ch/sem/en/home/publiservice/weisungen-...