subj. Nothing done from the moment of same topic (2014?).
We (users) are using machine interfaces for applying some action in accordance with what we see on the screen.
User->action(kb, mouse)->interpreted result (screen, in most cases).
Sometimes something goes wrong and we should undo our action (mistype, close needed tab).
The most common shortcut for this is Ctrl+z.
All machine interfaces shoud be user-oriented, not browser-oriented. We want to undo last USER action. Why do we need to use "another standard"?