Board Thread:General Discussion/@comment-27080627-20161013174107/@comment-168424-20161019230912

Not really. There are at least 3 slightly different versions, I believe. You can also compare Special:Version on various wikis to see the custom plugins each wiki has.

Also, the experience people have with editing varies depending on what editor/editing mode they use (see Special:Preferences). I use Source Editor exclusively, so I don't even see that popup.