Aren't those entirely optional?

I managed to get approval to bump my group up to C++11 a couple years ago thanks to some significant new features in the STL like usable smart pointers. So far none of the successive standards have offered anything sufficiently worthwhile to move us off C++11. It's possible that a new standard will introduce a killer features, but I wouldn't be too surprised if we simply stayed on C++11 forever.

The trick towards succcessful C++ development is to be very judicious in picking the features that you use. So not jumping to immediately using all the new features is a good sign.