It’s strictly the regulatory burden of EU membership without any of the benefits of the club.
That's not really true if you are living in one of those countries (I live in one of those countries). In general, we get the protections that the EU gives its people and I get free travel within the zone. Lots of little things like my phone working without outrageous charges when I travel to most places here, too.
Liechtenstein, Norway and Iceland are EEA members, and roaming is fine for those.
Switzerland has its own arrangement, and the roaming deal doesn't apply.
Andorra, Monaco, the United Kingdom, the Faroe Islands, Bosnia, Serbia, Kosovo, Montenegro, Belarus, Russia, North Macedonia, Ukraine and Moldova are not in the EU or EEA.
That's not really true if you are living in one of those countries (I live in one of those countries). In general, we get the protections that the EU gives its people and I get free travel within the zone. Lots of little things like my phone working without outrageous charges when I travel to most places here, too.