> reasonable baseline of appropriate You're just prejudging the answer. Who wouldn't want reasonable and appropriate? The issue is that a lot of these platform

> reasonable baseline of appropriate You're just prejudging the answer. Who wouldn't want reasonable and appropriate? The issue is that a lot of these platform-specific defaults are bad unergonomic legacy Case in point: "Or if the window close button was in the wrong corner?" That would be great to have on any platform since it's a common UI mistake to clump categorically different buttons (non-destructive minimize and destructive close) together, thus raising the cost of a misclick That's the main issue with your argument - yes, familiarity is a UI benefit, but the net benefit of following a UI convention depends entirely on said convention.