But I still can't drag a file to the task bar and drop it on a program to open it, or hover over an icon to shift focus to the icon's app and drop it onto that

But I still can't drag a file to the task bar and drop it on a program to open it, or hover over an icon to shift focus to the icon's app and drop it onto that app (e.g., to copy it). For shame. Microsoft, for shame.