That’s exactly why they should not be mixed. Well written C++ 20 is easy to work with and protects you from making mistakes, while C code not only happily gives

That’s exactly why they should not be mixed. Well written C++ 20 is easy to work with and protects you from making mistakes, while C code not only happily gives you the rope to rang yourself with—it requires you to use it! What makes C++ seem difficult today is all the things that it allows for back compat, and that those things are still how C++ is taught… by teaching “C/C++”.