https://community.adobe.com/questions-712/dragging-artboards-verrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrry-slow-1181420
Dragging artboards verrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrry slow!!! | Community
Alt+drag or even just moving artboards is so slow!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
draggingartboardsslowcommunity