Not possible to "select" multiple cells or "copy" a cell by dragging in Datasheet view
"Selecting" multiple cells or "Copying" a cell by dragging the cursor in datasheet does not work, since you can only drag to the end of the screen. In a long list you have to finish the drag, scroll down manually and repeat the action multiple times. This worked in SharePoint 2010 but not in SharePoint 2016. This is very annoying when you have a long list.