Earlier quoted context omitted.
slow compile times, complex language, sanity
Compile times aren't that slow, and the language is barely less complex than this insane hack. In fact C++'s complexity allows libraries to make their use a lot simpler. Consider string concatenation in C++ and C. Which is really simpler? The main reason I can think not to use C++ is that C has a simple stable ABI so you can easily use C libraries from many languages and compilers. But you can always wrap C++ librari…
Variable x, y, z;
solver.add(x = x - y);
double row[size+1] = { };
/* ...fill row... */
add_constraint(solver, row);
/* ...fill row... */
add_constraint(solver, row);
From the employment point of view, C++ is a nightmare. No one really knows it, and everyone thinks he does. Experienced developers can't tell what explicit constructor is, are confused with move semantics, blink hopelessly on "what is RVO". You actually employ python programmers for sky prices, while all they know is easiest part of C++/stl magic, which is effectively beginner-grade python with low-level bugs and UBs.
>wrap C++ libraries in a C API
Together with "ecosystem" such as std::cool_ptr>. That's a concern.
When I want nice bridgeable object model above C, I use Objective-C or simple embedded language with proper features. Personally, I'm really tired of C++ everywhere.