Where on Linux do Ctrl-c, v, and x not work? I haven't had a problem with them anywhere in a decade. I have largely stuck to Gnome2, MATE, and XFCE, though.
The problem with Ctrl C is that it is also the shortcut for SIGINT when the terminal is focused.
Also most terminal emulators will forward all Ctrl combinations directly over the TTY rather than capturing them in the windowing system, so in practice Ctrl-V rarely works in a terminal either. Likewise for Ctrl-W, which is typically bound to backwards-kill-word, etc.
The way it ends up in practice, shortcuts involving the Command key on OSX end up being clearly defined and consistent, because apps typically can't override them.
Also most terminal emulators will forward all Ctrl combinations directly over the TTY rather than capturing them in the windowing system, so in practice Ctrl-V rarely works in a terminal either. Likewise for Ctrl-W, which is typically bound to backwards-kill-word, etc.
The way it ends up in practice, shortcuts involving the Command key on OSX end up being clearly defined and consistent, because apps typically can't override them.