User blog comment:Rappy 4187/Technical Update: June 21, 2017/@comment-24258073-20170622090322/@comment-24258073-20170622223725

I thought that DISPLAYTITLE was supposed to change the name of the text, not make the text italic. Also Template:Title still won't work on the wikis that have that template. DISPLAYTITLE doesn't seem to be working for me either.

Oh wait. DISPLAYTITLE is working for me, as it's changing the name of the page when displayed on the tab and the screen, but it's still not changing the name for the main page. I can't get it to say something other than "Home". The same for talk pages and templates. It doesn't change the names for them either.