[flohofwoe]

Many of those new languages are created because C++ failed to improve C in the areas that really matter:

http://esr.ibiblio.org/?p=7724

[pjmlp]

Actually it improved, what C++ compilers cannot prevent is for people to write C code with a C++ compiler, beyond outlawing it as bad practice.

Copy-paste compatibility with C is a burden on modern computing, but it was also what contributed to C++'s adoption during the early 90's.