We get a lot of requests in studio to put content side by side - i.e. use a split screen layout, but have content on both sides of the split.
Not sure the development lift, but adding this layout would help many users achieve their desired designs without the use of CSS!
Big fan of this Connor.....Are you looking to move elements across the split screen? or do you just want the ability to place elements on both sides of the split screen? Any more detail will be super helpful!