I've genuinely never heard of such annoyances from actual users (at least not from most users, who aren't power users, and even then, not even from the power us

I've genuinely never heard of such annoyances from actual users (at least not from most users, who aren't power users, and even then, not even from the power users), and most cross platform frameworks already hook into the native APIs like for the back button, so it'd work the same either way.