How many Fortune 500 do you see writing those?
Microsoft, Apple, IBM, Amazon?
How many C++ developers can apply to work on those world wide?
The point isn't what companies are using C++11 or C++14, rather what companies for the common C++ developer on the street.
Sometimes HN seems to think SV is the only place where programmers live.
Compilers, games, and operating system components are archetypical systems software.