[kyberias]

Microsoft obviously should NOT first "complete" their C++11 support since there may very well be more important features in C++14 than some arcane features no-one would use in C++11. Same applies to all the other compiler vendors and all versions of the standard.

[flohofwoe]

Arcane features that no-one uses should not be in the standard but in some sort of optional extension, and a feature that is not supported by all major compilers might as well not exist, since it cannot be used in a portable code base.