I can't imagine how C++ standardization efforts could possibly correlate in any way with industry adoption. The two things are completely orthogonal.

C++ hasn't been eradicated, but --- even in some embedded environments --- it is no longer the go-to language (Java seems to have that honor now).

Bringing this back to Stross' point, though: ASCIIZ strings aren't more relevant to modern computer security because of C++. Obviously, C++ disfavors them (though most C++ devs I know still drop to charstars when std::string gets frustrating), but, more importantly, they have almost nothing to do with Java, C#, Python, or PHP string handling.