Weird argument: "they are in the UK, which is not in the EU, bouh! Look at us, we are in Switzerland, which is... also not in the EU..."
Not being subject to the UK and US surveillance laws seems as good an argument as any. Though I'm not sure if the GDPR allows for data to be stationed in Switzerland. It's not EU but it is party to a lot of treaties so it's not out of the question. Ironically it might become a safer place to station data if the EU manages to push through more surveillance decrees.
There is a treaty between the EU and Switzerland for this. Full list of countries here: https://commission.europa.eu/law/law-topic/data-protection/i...