User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-1807002-20200922180132/@comment-32704847-20200923143442

Having 2 vertical scroll bars there is just wrong.

But I doubt they will improve that, as they want people to use the 2017 editor. If the 2010 is working well, it's actually an advantage for them in this aspect.