Apparently this is now the only option? I can't get it to go away. I wouldn't mind if it didn't have bugs. For example, when starting a new section on a talk page and trying to use the signature button (four tilde button), it puts the signature in the subject line box, no matter how many times I move the cursor to the text box.(see screenshot: https://imgur.com/g39n9JX) ~~~~
Topic on 2017 wikitext editor/Feedback
That's the 2010 wikitext editor. It looks like you have installed several user scripts, too. I've left a link for you to test at https://en.wikipedia.org/wiki/Wikipedia:Teahouse#Visual_editing_not_available._Only_2017_wikitext_editor_available.