> you have to design to a lowest-common-denominator that balances

Something that's always stuck with me is a bit from the book "Don't Make Me Think" about cost vs. value in attention and complexity, that when you add a feature used by only a small percentage of users you're "taxing" 100% of users for the benefit of a few. That you should optimize for the common path and not edge cases. Over two decades later I still find this an exceedingly difficult challenge to juggle that doesn't just mean hiding advanced features behind extra menus.