I want to write C code, not C++ code. Even if I try to write C style C++, it is more verbose and less readable, because of various C++isms. For example, having to specify extern “C” to get sane ABI names for the Nvidia CUDA driver API:

https://docs.nvidia.com/cuda/cuda-driver-api/index.html

Not to mention that C++ does not support neat features like variable sized arrays on the stack.