Are there benchmarks websites that show average fixed broadband performance for Switzerland? Switzerland is not that in the rankings on Speedtest for example.
Init7 is the only ISP I know here that offers this speed. Most people are happy with 1gbit or less and there are also still many areas that do not have fiber plus the over 600k illegal p2mp connections that can't be used. Also many of the others have an insane oversubscribe factor.
More information on their setup they presented in this video: https://www.youtube.com/watch?v=wXmJCzMeIBo