It's easy and reasonably quick to set up key remapping (via Karabiner).
So yes keyboard remapping is an option. But there's just differences you can't remap because of the extra meta keys on Mac (and I guess on Windows too, with the Copilot or Start keys in play).
Right, and even on Linux you can do it by using the four-fifths forgotten CUA shortcut Ctrl-Insert for copy (and Shift-Insert for paste.) Although I'll admit to using Ctrl-Shift-C/V most of the time.