It's not a hardware interrupt at all, and needs to be specifically programmed into the text editor. It's just that that was the de-facto standard before Ctrl+C

It's not a hardware interrupt at all, and needs to be specifically programmed into the text editor. It's just that that was the de-facto standard before Ctrl+C and Ctrl+V replaced it. Back then, Ctrl+C was the break key, so it wasn't usable. Even in Windows today, you can still use Ctrl+Insert/Shift+Insert/Shift+Delete in text edit or rich edit controls. Libreoffice even supports it.