In the C++ standard library are mechanisms for doing strings, dynamic arrays, associative arrays, and bounds-checked arrays.
Sure, all this stuff can be done with libraries, following certain coding disciplines, etc. But object oriented programming can also be done in C (it's been done). Isn't it incongruous that something like strings, supported by the simplest BASIC interpreter, requires a very large and complicated infrastructure to support? Just the implementation of a string type in STL is over two thousand lines of code, using every advanced feature of templates. How much confidence can you have that this is all working correctly, how do you fix it if it is not, what do you do with the notoriously inscrutable error messages when there's an error using it, how can you be sure you are using it correctly (so there are no memory leaks, etc.)?
D's implementation of strings is simple and straightforward. There's little doubt about how to use it, no worries about memory leaks, error messages are to the point, and it isn't hard to see if it is working as expected or not.
