Moving to WikiEditor; we're probably going to kill the difference between the two, but for now…

I'm not sure which of these is most uptodate, but... here are some known knowns.

https://www.mediawiki.org/wiki/Manual:Interface/Access_keys

https://meta.wikimedia.org/wiki/Help:Keyboard_shortcuts

https://en.wikipedia.org/wiki/Wikipedia:Keyboard_shortcuts

https://www.mediawiki.org/wiki/VisualEditor/Portal/Keyboard_shortcuts

I think it is very unlikely this will ever be added to WikiEditor, now that we have VisualEditor-MediaWiki-2017WikitextEditor providing this functionality.

In the meantime, https://ru.wikipedia.org/wiki/Участник:Stjn/wikiEditorShortcuts.js provides similar functionality. But I do think that all modes of editing need to have the same keyboard shortcuts (at least where that makes sense) for a better user experience.

I'm about to implement the shortcuts in Convenient-Discussions as this is requested by users and I would rather not implement this apart from WikiEditor which Convenient Discussions employs. But if there is no activity in this task, I will have to.

In T62928#4779443, @TheDJ wrote:

I think it is very unlikely this will ever be added to WikiEditor, now that we have VisualEditor-MediaWiki-2017WikitextEditor providing this functionality.

As time has shown, the majority of users didn't migrate to that.