You're being a little disingenuous. Window Icons exist in Wayland, there's nothing stopping a compositor from adding an icon to their decorations. That proposal

You're being a little disingenuous. Window Icons exist in Wayland, there's nothing stopping a compositor from adding an icon to their decorations. That proposal is about windows being able to set their own icon. And drag and drop exists in Wayland. I can detach a tab from my browser and a new window appears and moves with the mouse. It seems that proposal was to replace an unstable protocol.