I guess what I mean to say is that there's no consistent paradigm for keyboard shortcuts. It's a lot more memorization and less real pattern to what keyboard shortcut will do what action.

And the only time I've encountered where it's not Ctrl+C in Linux is in the terminal. That feels like a reasonable exception to be grandfathered in, given it predates desktop environments. I will definitely grant that being able to Cmd+C/V in terminals is pleasant though.