On Linux, Control-C and Control-V don't work for copying and pasting in terminals. The Control modifier is used for its original purpose of inserting control codes. Instead, terminal apps require an extra Shift modifier, like Control+Shift+C.
But what if there were hidden shortcut combos for copy and paste
You describing a kill ring which is internal to the shell and not synced to the system clipboard. Nor does it work in GUI apps.
The benefit of universal bindings is not have to learn one method for GUI apps, another for terminals and a third for shells implementing the kill-ring like bindings.