And they still know for sure it's down to Cubase.
No need for bantering. I'm not sure you understand the cause.
I agree that it isn't a major problem if you work in a studio, but in live sessions it can be a problem that you have to reload the entire project during performance if something gets disconnected by mistake. USB-cables doesn't have clips so it can easily happen when you move around on stage.
It IS a Cubase-problem because it only reads the devices at Cubase-startup. Ableton Live and some other DAWs can refresh/read devices after startup if the user wants to. It's not 100% working in all DAWs, but at least it's something - and it proves that it isn't a Windows-problem per se. Microsoft could never release an update that makes this work, Cubase code must be changed.
Allocating the actual driver is something that Windows does - not Cubase. Cubase just has to update it's list of available devices (which may not be THAT simple since Cubase can overwrite settings/preferences in your current project).