I’ve contacted support and they’ve (after my pressing) have assured me that my account should be OK and UK terms should apply, due to them not having “an official presence” in Switzerland. Which obviously doesn’t properly explain it, because they surely aren’t having such presence in most countries. I mean… Iceland, Greece, Danmark, Liechtenstein?!.
Ultimately they have boiled down their list of European countries to the EEA again.
In my interpretation, this might mean - in the best case - that they can’t or don’t want to actively market their product outside of the EEA (as an offer from their UK entity, for the non-European countries they’ve probably set up shop there with a separate entity), though otherwise nothing is going to change.
In worse actual experience, I’ve been burned previously by Revolut canceling all their cards for all non-EEA residents literally overnight, back in 2016 or so (including all Swiss users).
PS: After a quick glance at their terms and conditions, I also found a restriction to EEA countries in (chapter 26) their “refund rights for Revolut Card payments”. Taking the wording at face value, you don’t enjoy their refund / protection for card payments in Switzerland, as they’d be in a non-European country.