Science | Business is citing an anynomous Swiss official:
"A Swiss official said that as a consequence of the Selmayr memo, the commission's legal service is now delaying Swiss membership of EuroHPC, a new Horizon 2020-funded joint undertaking in high performance computing. That is despite the fact, 'We were giving a lot of resources and support in setting up this new joint undertaking', according to the official. Switzerland is currently home to the most powerful supercomputer in Europe."
We did not get that confirmed yet, but in general Science | Business is well-informed.
For the timeline of EuroHPC (including the signing of Switzerland of the EuroHPC declaration) see:
Our coverage of the pre-exascale hosting entity call:
The Science | Business article: