User blog comment:Bandettos/What Happened to the editing layout?/@comment-43958241-20200415220430

That's called ucp, and no, you can't go back to the old, eventually all wikis will have the new UCP layout. As of now, all wikis created after 11th of march have this new layout, but you will get used to it. Also infoboxes still work. Miskeeping wiki has the new layout and infoboxes, mediawiki and a lot of functions still work.

Also UCP is still in development so you should expect updates improving it.