While the NSA would, absolutely, use it to elevate existing internal access - it is such low-hanging fruit that they have enough alternative tools in their arsenal that it isn't a particularly big loss. Most of their competent adversaries disabled it years ago (as has been best-practice since 2010~).
More likely, it is Microsoft's obsession with backwards compatibility. Which while a great philosophy in general has given them a black eye several times before vis-a-vis security posture.
Low.
While the NSA would, absolutely, use it to elevate existing internal access - it is such low-hanging fruit that they have enough alternative tools in their arsenal that it isn't a particularly big loss. Most of their competent adversaries disabled it years ago (as has been best-practice since 2010~).
More likely, it is Microsoft's obsession with backwards compatibility. Which while a great philosophy in general has given them a black eye several times before vis-a-vis security posture.