Earlier quoted context omitted.
c++11 came in 2011. c++14 came in 2014. Seeing a pattern yet?
When we'll have a compiler support - this is what really matters, especially for those who use MSVC... It is 2015 and we still don't have a full C++11 support.
"First, let’s look at the C++11 language features. Clang 3.3 and above, and GCC 4.8 and later have complete support, so there was no point including them in the table."
Also note that, on the C++14 front, clang supported all language features and most library features. And that is a year ago.