AFAIK CUA wasn't for GUI apps (i think there was even some DOS-based "demo" that used text mode), some text-based DOS programs used it (the Shift+Ins, etc short

AFAIK CUA wasn't for GUI apps (i think there was even some DOS-based "demo" that used text mode), some text-based DOS programs used it (the Shift+Ins, etc shortcuts you'd find in Turbo Vision-based programs used CUA). Also what we often call "CUA" nowadays is actually Microsoft's modifications, even if it was based on IBM's (which AFAIK doesn't have things like Ctrl+V for paste but instead the Shift+Ins i mentioned above).