I don't believe this is a truly valid concern for the most part. The very few 'desktop' apps I use today don't really implement platform UI behaviour, rather,

I don't believe this is a truly valid concern for the most part. The very few 'desktop' apps I use today don't really implement platform UI behaviour, rather, the apps seem fairly consistent across platforms. Adobe products, Android Studio, Ableton, VS Code, Atlassian products - they seem more similar to me than otherwise across platforms. Mobile platforms I think are quite different in this regard, whereupon they have considerably more 'specific' features. But on the desktop - I think as long as the common keyboard binding/shortcuts are respected ... then this is ok.