FoM doesn't require to stay in Schengen-Dublin though.

Yeah, but Schengen Area !== EU.

When I was at CERN, it was before Schengen became a thing, so as Portuguese I had the same VISA issues as someone else coming out of the other side of the planet.

Worse, being at CERN wasn't a plus for the hiring process, I would need to apply to the position as if still living in Portugal, as my VISA was tied to CERN directly with a three month deadline to leave Switzerland after the contract duration.

It also did not help, that my fellow country folks do not have a positive image across the country, for various kind of reasons, which is another issue I experienced while living there, like being refused entry in clubs when showing a Portuguese ID card.

Eventually I moved back to another EU country, still I do visit Switzerland, from time to time.

Pity that right wing movements are taking off all over the place.