I love C, loathe C++, but it is still valid issue that polymorphism in C is hard and error handling rely on convention ? (I know of Zig, Nim et al, I'm more ori

I love C, loathe C++, but it is still valid issue that polymorphism in C is hard and error handling rely on convention ? (I know of Zig, Nim et al, I'm more oriented towards Rust this last year)