Current column management is dealt with horizontally, dragging columns left and right.
Current visibility management is dealt with vertically, ticking columns on and off.
With horizontal management, only 5-10 columns fit on a screen.
With vertical management, there is potential to fit 5x or more columns on a screen.
Our customers often have around 100 columns, and need to reorder frequently.
They are asking for more easy column management.
Other grid/table solutions often offer an edge-auto-scroll feature, which I have seen a Feature Request here and have upvoted it.
But we strongly feel that a vertical arrangement, such as the one already existing in the Column-Context-Menu, could provide our customers with a better UX.