I never bothered to wonder why my sister in Germany has lousy Internet where as I declined to upgrade my 1 Gbit/s to 10 Gbit/s because we don't need it.

"You may have heard about 25 Gbit symmetrical internet in Switzerland. This is often cited as the fastest dedicated (non-shared) residential connection in the world. However, did you ever wonder why Switzerland has such fast internet at a reasonable price … ?" -- The Free Market Lie: Why Switzerland Has 25 Gbit Internet and America Doesn't

The answer is that in Switzerland, fibre is treated as infrastructure -- like water, like electricity. That is to say, the providers don't put down their own cables. One company puts down the cables and then all the providers get access to it. End users get to pick the provider they want.

Interestingly, the article then goes on to say that the regulation leading to this was spearheaded by Swisscom in 2008 who tried to change course in 2020. Init7, one of the providers, took Swisscom to court. In 2024, the case had gone through all the layers and Init7 won. The old regulation stayed in place.

Incidentally, one of the reasons I'm a happy #Init7 customer.