People have that impression - that Stroustrup "dumped everything into C++" - but it's demonstrably not true if you read D&E. Every new feature that made it into the language after the standardization point had a working implementation, and people had experience with that implementation. He goes over lots of rejected features.

Also consider what your statement implies: Stroustrup put too many features into C++ (bad), but he did not put feature X into C++ (also bad). You're faulting him for accepting too much, but at the same time, for not accepting one in particular. Although it should really be noted that post-standardization, what made it into C++ was a committee decision, not Stroustrup alone.