The C header interface is simple: struct foo; struct foo *foo_alloc(); void foo_do_something(struct foo *p, ...); This gives a simple to understand API

The C header interface is simple: struct foo; struct foo *foo_alloc(); void foo_do_something(struct foo *p, ...); This gives a simple to understand API with clearly defined boundary, has a stable ABI, preserves fast compilation times, avoids instruction bloat, etc. One could do this in C++ too, but what would be the point of using C++ then...