No, but having used the linux desktop for over a decade (last stop was the ion3 wm) and now OSX, I have come to the conclusion that some of the wrongs with X11

No, but having used the linux desktop for over a decade (last stop was the ion3 wm) and now OSX, I have come to the conclusion that some of the wrongs with X11 just have no excuses anymore. While there may still be (weak) arguments for preferring "select-to-copy" over "CTRL-C-to-copy" there is not a single argument for maintaining the mess of multiple inconsistent copy/paste methods in parallel. This is not a matter of polish, preference or imitating what others do. It's a matter of finally applying the no-brainer lowest baseline of common sense.