They’re also significant funded by the state particularly as they’re the two federal universities. The figure I heard while there, although I can’t find actual numbers online, was in the low tens of thousands in subsidies that may otherwise mostly be collected through tuition.

Also, it’s not exactly what I would call open enrolment as it’s only open to Swiss students who are accepted into and pass a Matura program or similar in grade school while other students typically require applications or minimum exam scores depending on the program.

I was speaking to the US situation, and agree most European schools are quite cheap in comparison. Not only in tuition, but in terms of their budgets; US schools spend 4-5X as much per student- so it isnt just about state funding.

Education quality, especially adjusting for tuition, doesn't correlate to prestige. Which, after WWII, almost required "Anglophone" as the language of instruction.