No firmware patches for the Surface 3 either.
The Surface 3 didn't even reach the first customers until May 2015.
So, this means the oldest Surface 3s are still less than 3 years old and some are less than 2. Yet, Microsoft still decided these are "older models" that won't get patched?
Point being, Intel has not released a firmware fix for the Atom X7-Z8700 so Microsoft can't either, no matter how bad they want to, nor can they predict when Intel will release one. It is probably not high on their priority list.