Part of the reason C++ has been so successful is that the goal was not just to turn C into an OOP language (although it started that way), but also to solve many other problems facing developers today, especially those who have large investments in C. Traditionally, OOP languages have suffered from the attitude that you should abandon everything you know and start from scratch with a new set of concepts and a new syntax, arguing that it’s better in the long run to lose all the old baggage that comes with procedural languages. This may be true, in the long run. But in the short run, a lot of that baggage was valuable. The most valuable elements may not be the existing code base (which, given adequate tools, could be translated), but instead the existing mind base. If you’re a functioning C programmer and must drop everything you know about C in order to adopt a new language, you immediately become much less productive for many months, until your mind fits around the new paradigm. Whereas if you can leverage off of your existing C knowledge and expand on it, you can continue to be productive with what you already know while moving into the world of object-oriented programming. As everyone has his or her own mental model of programming, this move is messy enough as it is without the added expense of starting with a new language model from square one. So the reason for the success of C++, in a nutshell, is economic: It still costs to move to OOP, but C++ may cost less[21].

The goal of C++ is improved productivity. This productivity comes in many ways, but the language is designed to aid you as much as possible, while hindering you as little as possible with arbitrary rules or any requirement that you use a particular set of features. C++ is designed to be practical; C++ language design decisions were based on providing the maximum benefits to the programmer (at least, from the world view of C).