[yunruse]

But it is in the EEA. I would imagine the barrier here isn’t legal policy or trade customs but simply currency difference. Since the price-cap charade a few years ago, the Franc has probably lost trust with quite a few businesses.

[hsivonen]

Switzerland is not part of the EEA. It has a bunch of EEA-like bespoke deals with the EU.

The most obvious gap for a traveler is that the EEA mobile roaming price regulation doesn't apply if you are on an EEA operator and roam to Switzerland.