If we were able to agree to those rules I'm sure we could strike a deal with the EU. This has always been the name of the game right - if you play by each set of rules and align the EU probably sees that as a net benefit and lets countries align, for eaxample Switzerland can still host EU personal data, from the article:
"Fortunately, Switzerland, along with 12 other non-EEA countries, has received an "adequacy decision" from the European Commission. An adequacy decision is a recognition of the strength of Switzerland's data protection law."
"Fortunately, Switzerland, along with 12 other non-EEA countries, has received an "adequacy decision" from the European Commission. An adequacy decision is a recognition of the strength of Switzerland's data protection law."
https://www.termsfeed.com/blog/gdpr-switzerland/