Individual style choices (e.g. whether to use a shadow or not) are always going to be opinionated. Even if one choice is objectively better, it's not going to b

Individual style choices (e.g. whether to use a shadow or not) are always going to be opinionated. Even if one choice is objectively better, it's not going to be so 100% of the time, in every context, to all users. Consistency is always better. App A and App B should use the same save icon, without any caveats, regardless of what it actually is. If you offer me a consistent experience, I'll take it whether it's Windows 95 or Tahoe.