In Emacs if CUA mode is on, C-c behaves as copy if any text is selected (and if no other keys have been pressed within a short time). To send a C-c when text is selected you do a C-S-c instead. Similarly in Windows Terminal I remember C-c works as copy without any issue (it deselects the text with the first C-c IIRC, so if you do two C-c's with text selected you copy and then send an interrupt).

Do any linux terminals implement anything like this? Why resort to adding new keys to keyboards?