I would argue that you're eschewing Lisp and Scheme in terms of independent, active implementations, however in a more general sense I agree.

Moving fast (and breaking things) is just not what the standardization committee does, and that's fine. They can move faster since C++11/14, but sometimes you really don't want a giant moving target with new features all the time. I think their approach works for the kind of environment you find C++ used in.