I would hope Switzerland isnt stupid enough to do this. Their reputation as a country is based around trust. Dozens of highly profitable privacy based companies would be forced to relocate.
While these companies make up a very small percentage of the GDP, they'd take people out of work, hurt their reputation, and take a minor blow to their budget.
Though, this isnt considering future prospects; the Proton suite is getter better, fast. It wouldn't surprise me, if in a few years, their suite could rival Google's or Microsoft's.
It could be very profitable in the future, but kneecapping the VPN would really slow things down.