None, and anyone who cares could replace the files with a newer version its not like MS would make it hard to do that.
define the average windows user.
then how much of the windows market does that exclude
Another way to look at it is, how hard is the issue to exploit and what are the impacts? Does exploitation require local admin access?
My point really was that the write up is mostly a rant and provides nothing to help anyone that is impacted. Seems more about poking Microsoft than solving security issues.