The person(s) behind this series of disclosures are clearly highly intelligent, knowledgeable, and industrious. Microsoft should be paying them the minimal acceptable bug bounty -- per bug, which is this case is $1M USD. (Anything less than that is an insult.) But of course Microsoft is far too accustomed to lying, cheating, and screwing other people, it's so embedded in their corporate culture, that it has never occurred to them to even try to do the right thing.
Now to turn my attention to the Subject of this posting. Surely nobody thinks that the person(s) behind this particular effort are the only ones conducting such research. And it is importable that they are the most intelligent, most knowledgeable, and most industrious -- in other words, there are probably people out there somewhere who are even better. And, rather ominously, who aren't doing the world the enormous favor of making these known publicly.
That's an easy speculation to make, of course, but it's also congruent with history. "There's always someone cleverer than yourself" is a wise maxim because in all but a very, very cases it's accurate. So unless this one of those cases -- and I very much doubt that -- then there are one or more other person(s) out there discovering bugs of similar severity and consequences, and doing....well, we don't know what they're doing with them. If they're working for national intelligence agencies, then likely stockpiling them for future exploitation. If they're working for themselves, perhaps packaging and seller them on the open market. There are all kinds of possibilities and none of them bode well.
TL;DR: we have reached the point where it has become painfully obvious that Microsoft can't secure its own operating system for any even minimally acceptable value of "secure"; every day it becomes more obvious that they're losing.