"C-like" code in C++ still has C++ semantics. "modern C++" is a disputed paradigm, but not necessarily how things should be done. When you write C++, but not "modern C++", that doesn't mean you are writing C. There are also modern features in C. https://floooh.github.io/2019/09/27/modern-c-for-cpp-peeps.h...

Null terminated strings with pointer arithmetic instead of std::string and string_view, pointer arithmetic instead of std::span, bare pointer arrays instead of std::array and std::vector, C style casts,...

Sure, that is all modern C++, but we are talking about C vs. C++, not about C++ vs. modern C++ and we certainly don't want to conflate non-modern C++ with C.