Why is C++ still “hybrid”

Question

On a related question, it has been clarified why C++ is not compatible with C in many aspects. However C++ is still a "hybrid"* language. And unfortunately, many programmers still consider C++ as a "C with streams and built-in strings". That results in really bad written code, that it's neither C++ nor C. IMHO, it would be better if the language/compiler forced to some extent programmers to write more elegant code. So is there a rationale for keeping modern C++ (for instance C++0x and future versions) hybrid?

_{* By hybrid I mean that it's up to the programmer to decide if he/she will use: standard strings and streams, classes, namespaces other than the default, etc.}