User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-45002574-20200923110015/@comment-24258073-20200924091542

You seriously don't know?

Well there's a number of new features that are introduced in versions of MediaWiki than the one legacy wikis use.

Being able to move categories is one major improvement. Being able to merge page histories is another (though it is listed on legacy wikis, it isn't properly enabled)

I'm actually quite shocked that you haven't noticed the improvements. Perhaps if you read every single word contained in this blog you'd know. The return of the 2010 editor is one huge step forward, and I look forward to seeing more steps forward in the near future.

I am quite disappointed however that we can't enable the 2010 source editor on UCP wikis without disabling the source editor on legacy wikis. It also automatically disables category exhibition in your preferences on legacy wikis. This is really awkward.