Not familiar with the Swiss system, but CA system has some interesting nuances - laws enacted as approved propositions cannot be modified at all, except by another approved proposition. In theory, that protects them from legislative overwriting/meddling, but also does not allow to fix unintended consequences. Here’s an example where a proposition was needed to authorize state legislature to make modifications to an older proposition: https://en.wikipedia.org/wiki/2018_California_Proposition_7

And of course, CA still has daylight savings time because this proposition required two thirds vote.