It's command-c and command-v there. I only recently learned that command-right arrow goes to the end of line on Mac OS, making the elision of the home and end button on keyboards less egregious than on windows.

Exactly, that's what I'm talking about.

So MacOS lives just fine with their own additional button and bindings, I don't see how it's different for Linux.

Every time I need to do something on MacOS, being Linux user, I stuck hitting ctrl-c/ctrl-v instead of cmd, but nobody says that stops them from having a decent marketshare.